Stratum ID 7-character (cnt + region ID + original stratum ID)
ALB0001 = ALB - stratum 01: Urban \ North \ Public
ALB0002 = ALB - stratum 02: Urban \ North \ Private
ALB0003 = ALB - stratum 03: Urban \ Center \ Public
ALB0004 = ALB - stratum 04: Urban \ Center \ Private
ALB0005 = ALB - stratum 05: Urban \ South \ Public
ALB0006 = ALB - stratum 06: Urban \ South \ Private
ALB0007 = ALB - stratum 07: Rural \ North \ Public
ALB0008 = ALB - stratum 08: Rural \ North \ Private
ALB0009 = ALB - stratum 09: Rural \ Center \ Public
ALB0010 = ALB - stratum 10: Rural \ Center \ Private
ALB0011 = ALB - stratum 11: Rural \ South \ Public
ALB0012 = ALB - stratum 12: Rural \ South \ Private
ARE0101 = ARE - stratum 01: Abu Dhabi \ MoE \ Public
ARE0102 = ARE - stratum 02: Abu Dhabi \ MoE \ Private
ARE0104 = ARE - stratum 04: Abu Dhabi \ US \ Private
ARE0106 = ARE - stratum 06: Abu Dhabi \ UK \ Private
ARE0108 = ARE - stratum 08: Abu Dhabi \ Indian \ Private
ARE0109 = ARE - stratum 09: Abu Dhabi \ Other \ Public
ARE0110 = ARE - stratum 10: Abu Dhabi \ Other \ Private
ARE0218 = ARE - stratum 18: Dubai \ Indian \ Private
ARE0219 = ARE - stratum 19: Dubai \ Other \ Public
ARE0220 = ARE - stratum 20: Dubai \ Other \ Private
ARE0321 = ARE - stratum 21: Sharjah \ MoE \ Public
ARE0322 = ARE - stratum 22: Sharjah \ MoE \ Private
ARE0324 = ARE - stratum 24: Sharjah \ US \ Private
ARE0326 = ARE - stratum 26: Sharjah \ UK \ Private
ARE0328 = ARE - stratum 28: Sharjah \ Indian \ Private
ARE0329 = ARE - stratum 29: Sharjah \ Other \ Public
ARE0330 = ARE - stratum 30: Sharjah \ Other \ Private
ARE0438 = ARE - stratum 38: Ajman \ Indian \ Private
ARE0439 = ARE - stratum 39: Ajman \ Other \ Public
ARE0440 = ARE - stratum 40: Ajman \ Other \ Private
ARE0541 = ARE - stratum 41: Umm Al Quwain \ MoE \ Public
ARE0542 = ARE - stratum 42: Umm Al Quwain \ MoE \ Private
ARE0548 = ARE - stratum 48: Umm Al Quwain \ Indian \ Private
ARE0549 = ARE - stratum 49: Umm Al Quwain \ Other \ Public
ARE0651 = ARE - stratum 51: Ras Al Khaimah \ MoE \ Public
ARE0652 = ARE - stratum 52: Ras Al Khaimah \ MoE \ Private
ARE0654 = ARE - stratum 54: Ras Al Khaimah \ US \ Private
ARE0658 = ARE - stratum 58: Ras Al Khaimah \ Indian \ Private
ARE0659 = ARE - stratum 59: Ras Al Khaimah \ Other \ Public
ARE0660 = ARE - stratum 60: Ras Al Khaimah \ Other \ Private
ARE0761 = ARE - stratum 61: Fujairah \ MoE \ Public
ARE0762 = ARE - stratum 62: Fujairah \ MoE \ Private
ARE0766 = ARE - stratum 66: Fujairah \ UK \ Private
ARE0768 = ARE - stratum 68: Fujairah \ Indian \ Private
ARE0769 = ARE - stratum 69: Fujairah \ Other \ Public
ARE9797 = Undisclosed STRATUM - United Arab Emirates
BEL0101 = BEL - stratum 01: 01: Flanders\Gen Ed only\private subsidized\ISCED2
BEL0102 = BEL - stratum 02: 02: Flanders\Gen Ed only\private subsidized\ISCED3
BEL0103 = BEL - stratum 03: 03: Flanders\Gen Ed only\private subsidized\Mixed ISCED
BEL0104 = BEL - stratum 04: 04: Flanders\Gen Ed only\network comm. Schls\ISCED2
BEL0105 = BEL - stratum 05: 05: Flanders\Gen Ed only\network comm. Schls\ISCED3
BEL0106 = BEL - stratum 06: 06: Flanders\Gen Ed only\network comm. Schls\Mixed ISCED
BEL0107 = BEL - stratum 07: 07: Flanders\Gen Ed and other type\private subsidized\ISCED2
BEL0108 = BEL - stratum 08: 08: Flanders\Gen Ed and other type\private subsidized \ISCED3
BEL0109 = BEL - stratum 09: 09: Flanders\Gen Ed and other type\private subsidized \Mixed ISCED
BEL0110 = BEL - stratum 10: 10: Flanders\Gen Ed and other type\network comm. Schls\ISCED2
BEL0111 = BEL - stratum 11: 11: Flanders\Gen Ed and other type\network comm. Schls\ISCED3
BEL0112 = BEL - stratum 12: 12: Flanders\Gen Ed and other type\network comm. Schls\Mixed ISCED
BEL0113 = BEL - stratum 13: 13: Flanders\Tech or Voc\private subsidized\ISCED2
BEL0114 = BEL - stratum 14: 14: Flanders\Tech or Voc\private subsidized\ISCED3
BEL0115 = BEL - stratum 15: 15: Flanders\Tech or Voc\private subsidized\Mixed ISCED
BEL0116 = BEL - stratum 16: 16: Flanders\Tech or Voc\network comm. Schls\ISCED2
BEL0117 = BEL - stratum 17: 17: Flanders\Tech or Voc\network comm. Schls\ISCED3
BEL0118 = BEL - stratum 18: 18: Flanders\Tech or Voc\network comm. Schls\Mixed ISCED
BEL0119 = BEL - stratum 19: 19: Flanders\Special Ed\private subsidized
BEL0120 = BEL - stratum 20: 20: Flanders\Special Ed\network comm. schls
BEL0121 = BEL - stratum 21: 21: Flanders\Part-time Vocational Ed
BEL0222 = BEL - stratum 22: 22: French com\Regular\ISCED2
BEL0223 = BEL - stratum 23: 23: French com\Regular\ISCED3\Academic only
BEL0224 = BEL - stratum 24: 24: French com\Regular\ISCED3\Mixed
BEL0225 = BEL - stratum 25: 25: French com\Regular\ISCED3\Vocational only
BEL0226 = BEL - stratum 26: 26: French com\Regular\ Mixed ISCED\Academic only
BEL0227 = BEL - stratum 27: 27: French com\Regular\ Mixed ISCED\Mixed
BEL0228 = BEL - stratum 28: 28: French com\Regular\ Mixed ISCED\Vocational only
BEL0229 = BEL - stratum 29: 29: French com\Special Ed
BEL0230 = BEL - stratum 30: 30: French com\Part-time Vocational Ed
BEL0331 = BEL - stratum 31: 31: German com\Regular
BEL0332 = BEL - stratum 32: 32: German com\Special Ed
BRA0204 = BRA - stratum 04: 4 ALAGOAS\NO MODAL GRADE
BRA0306 = BRA - stratum 06: 6 AMAPÁ\NO MODAL GRADE
BRA0407 = BRA - stratum 07: 7 AMAZONAS\MODAL GRADE
BRA0408 = BRA - stratum 08: 8 AMAZONAS\NO MODAL GRADE
BRA0510 = BRA - stratum 10: 10 BAHIA\NO MODAL GRADE
BRA0612 = BRA - stratum 12: 12 CEARÁ\NO MODAL GRADE
BRA0713 = BRA - stratum 13: 13 DISTRITO FEDERAL\MODAL GRADE
BRA0714 = BRA - stratum 14: 14 DISTRITO FEDERAL\NO MODAL GRADE
BRA0815 = BRA - stratum 15: 15 ESPÍRITO SANTO\MODAL GRADE
BRA0816 = BRA - stratum 16: 16 ESPÍRITO SANTO\NO MODAL GRADE
BRA0918 = BRA - stratum 18: 18 GOIÁS\NO MODAL GRADE
BRA1019 = BRA - stratum 19: 19 MARANHÃO\MODAL GRADE
BRA1020 = BRA - stratum 20: 20 MARANHÃO\NO MODAL GRADE
BRA1121 = BRA - stratum 21: 21 MATO GROSSO\MODAL GRADE
BRA1122 = BRA - stratum 22: 22 MATO GROSSO\NO MODAL GRADE
BRA1223 = BRA - stratum 23: 23 MATO GROSSO DO SUL\MODAL GRADE
BRA1224 = BRA - stratum 24: 24 MATO GROSSO DO SUL\NO MODAL GRADE
BRA1325 = BRA - stratum 25: 25 MINAS GERAIS\MODAL GRADE
BRA1326 = BRA - stratum 26: 26 MINAS GERAIS\NO MODAL GRADE
BRA1428 = BRA - stratum 28: 28 PARÁ\NO MODAL GRADE
BRA1529 = BRA - stratum 29: 29 PARAÍBA\MODAL GRADE
BRA1530 = BRA - stratum 30: 30 PARAÍBA\NO MODAL GRADE
BRA1632 = BRA - stratum 32: 32 PARANÁ\NO MODAL GRADE
BRA1733 = BRA - stratum 33: 33 PERNAMBUCO\MODAL GRADE
BRA1734 = BRA - stratum 34: 34 PERNAMBUCO\NO MODAL GRADE
BRA1836 = BRA - stratum 36: 36 PIAUÍ\NO MODAL GRADE
BRA1937 = BRA - stratum 37: 37 RIO DE JANEIRO\MODAL GRADE
BRA1938 = BRA - stratum 38: 38 RIO DE JANEIRO\NO MODAL GRADE
BRA2039 = BRA - stratum 39: 39 RIO GRANDE DO NORTE\MODAL GRADE
BRA2040 = BRA - stratum 40: 40 RIO GRANDE DO NORTE\NO MODAL GRADE
BRA2141 = BRA - stratum 41: 41 RIO GRANDE DO SUL\MODAL GRADE
BRA2142 = BRA - stratum 42: 42 RIO GRANDE DO SUL\NO MODAL GRADE
BRA2243 = BRA - stratum 43: 43 RONDÔNIA\MODAL GRADE
BRA2244 = BRA - stratum 44: 44 RONDÔNIA\NO MODAL GRADE
BRA2345 = BRA - stratum 45: 45 RORAIMA\MODAL GRADE
BRA2346 = BRA - stratum 46: 46 RORAIMA\NO MODAL GRADE
BRA2447 = BRA - stratum 47: 47 SANTA CATARINA\MODAL GRADE
BRA2448 = BRA - stratum 48: 48 SANTA CATARINA\NO MODAL GRADE
BRA2549 = BRA - stratum 49: 49 SÃO PAULO\MODAL GRADE
BRA2550 = BRA - stratum 50: 50 SÃO PAULO\NO MODAL GRADE
BRA2651 = BRA - stratum 51: 51 SERGIPE\MODAL GRADE
BRA2652 = BRA - stratum 52: 52 SERGIPE\NO MODAL GRADE
BRA2753 = BRA - stratum 53: 53 TOCANTINS\MODAL GRADE
BRA2754 = BRA - stratum 54: 54 TOCANTINS\NO MODAL GRADE
CAN0101 = CAN - stratum 01: prov 10 Fr.& Eng. 0,1,2
CAN0102 = CAN - stratum 02: prov 10 Fr.& Eng. 3 to 20
CAN0103 = CAN - stratum 03: prov 10 Fr.& Eng. 21 to 41
CAN0104 = CAN - stratum 04: prov 10 Fr.& Eng. 42 to …
CAN0211 = CAN - stratum 11: prov 11 Fr.& Eng. 0,1,2
CAN0212 = CAN - stratum 12: prov 11 Fr.& Eng. 3 to 20
CAN0213 = CAN - stratum 13: prov 11 Fr.& Eng. 21 to …
CHE0101 = CHE - stratum 01: German, ISCED2, public
CHE0102 = CHE - stratum 02: German, ISCED2, private-subsidized
CHE0103 = CHE - stratum 03: German, ISCED2, private-not subsidized
CHE0105 = CHE - stratum 05: German, Mixed, private-subsidized
CHE0106 = CHE - stratum 06: German, Mixed, private-not subsidized
CHE0107 = CHE - stratum 07: German, ISCED3, public
CHE0108 = CHE - stratum 08: German, ISCED3, private-subsidized
CHE0109 = CHE - stratum 09: German, ISCED3, private-not subsidized
CHE0210 = CHE - stratum 10: French, ISCED2, public
CHE0211 = CHE - stratum 11: French, ISCED2, private-subsidized
CHE0212 = CHE - stratum 12: French, ISCED2, private-not subsidized
CHE0214 = CHE - stratum 14: French, Mixed, private-subsidized
CHE0215 = CHE - stratum 15: French, Mixed, private-not subsidized
CHE0216 = CHE - stratum 16: French, ISCED3, public
CHE0217 = CHE - stratum 17: French, ISCED3, private-subsidized
CHE0218 = CHE - stratum 18: French, ISCED3, private-not subsidized
CHE0319 = CHE - stratum 19: Italian, ISCED2, public
CHE0321 = CHE - stratum 21: Italian, ISCED2, private-not subsidized
CHE0323 = CHE - stratum 23: Italian, Mixed, private-subsidized
CHE0324 = CHE - stratum 24: Italian, Mixed 2, private-not subsidized
CHE0325 = CHE - stratum 25: Italian, ISCED3, public
CHE0326 = CHE - stratum 26: Italian, ISCED3, private-subsidized
CHE0327 = CHE - stratum 27: Italian, ISCED3, private-not subsidized
CHL0101 = CHL - stratum 01: MUNICIPAL,PRIMARY,PRIMARY,NO 10TH GRADE
CHL0102 = CHL - stratum 02: MUNICIPAL,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0103 = CHL - stratum 03: MUNICIPAL,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,NO 10TH GRADE
CHL0104 = CHL - stratum 04: MUNICIPAL,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC & TECH PROFESSIONAL,HAS 10TH GRADE
CHL0105 = CHL - stratum 05: MUNICIPAL,PRIMARY & SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0106 = CHL - stratum 06: MUNICIPAL,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0107 = CHL - stratum 07: MUNICIPAL,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC & TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0108 = CHL - stratum 08: MUNICIPAL,SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0209 = CHL - stratum 09: SUBSIDIZED,PRIMARY,PRIMARY,NO 10TH GRADE
CHL0210 = CHL - stratum 10: SUBSIDIZED,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0211 = CHL - stratum 11: SUBSIDIZED,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,NO 10TH GRADE
CHL0212 = CHL - stratum 12: SUBSIDIZED,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC & TECH PROFESSIONAL,HAS 10TH GRADE
CHL0213 = CHL - stratum 13: SUBSIDIZED,PRIMARY & SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0214 = CHL - stratum 14: SUBSIDIZED,PRIMARY & SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,NO 10TH GRADE
CHL0215 = CHL - stratum 15: SUBSIDIZED,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0216 = CHL - stratum 16: SUBSIDIZED,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC & TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0217 = CHL - stratum 17: SUBSIDIZED,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC & TECHNICAL PROFESSIONAL,NO 10TH GRADE
CHL0218 = CHL - stratum 18: SUBSIDIZED,SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,HAS 10TH GRADE
CHL0219 = CHL - stratum 19: SUBSIDIZED,SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,NO 10TH GRADE
CHL0320 = CHL - stratum 20: PRIVATE,PRIMARY,PRIMARY,NO 10TH GRADE
CHL0321 = CHL - stratum 21: PRIVATE,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0322 = CHL - stratum 22: PRIVATE,PRIMARY & SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,NO 10TH GRADE
CHL0323 = CHL - stratum 23: PRIVATE,SECONDARY,SECONDARY HUMANISTIC SCIENTIFIC,HAS 10TH GRADE
CHL0324 = CHL - stratum 24: PRIVATE,SECONDARY,SECONDARY TECHNICAL PROFESSIONAL,HAS 10TH GRADE
COL0101 = COL - stratum 01: 01: BOGOTÁ \ MODAL \ COMPLETE
COL0102 = COL - stratum 02: 02: BOGOTÁ \ MODAL \ REST
COL0103 = COL - stratum 03: 03: BOGOTÁ \ NO MODAL \ COMPLETE
COL0104 = COL - stratum 04: 04: BOGOTÁ \ NO MODAL \ REST
COL0205 = COL - stratum 05: 05: REST OF MANIZALES \ MODAL \ COMPLETE
COL0206 = COL - stratum 06: 06: REST OF MANIZALES \ MODAL \ REST
COL0207 = COL - stratum 07: 07: REST OF MANIZALES \ NO MODAL \ COMPLETE
COL0208 = COL - stratum 08: 08: REST OF MANIZALES \ NO MODAL \ REST
COL0309 = COL - stratum 09: 09: MANIZALES-ESCUELA ACTIVA \ MODAL \ REST
COL0310 = COL - stratum 10: 10: MANIZALES-ESCUELA ACTIVA \ NO MODAL \ REST
COL0411 = COL - stratum 11: 11: MEDELLÍN \ MODAL \ COMPLETE
COL0412 = COL - stratum 12: 12: MEDELLÍN \ MODAL \ REST
COL0413 = COL - stratum 13: 13: MEDELLÍN \ NO MODAL \ COMPLETE
COL0414 = COL - stratum 14: 14: MEDELLÍN \ NO MODAL \ REST
COL0515 = COL - stratum 15: 15: CALI \ MODAL \ COMPLETE
COL0516 = COL - stratum 16: 16: CALI \ MODAL \ REST
COL0517 = COL - stratum 17: 17: CALI \ NO MODAL \ COMPLETE
COL0518 = COL - stratum 18: 18: CALI \ NO MODAL \ REST
COL0619 = COL - stratum 19: 19: REST OF THE COUNTRY \ MODAL \ COMPLETE
COL0620 = COL - stratum 20: 20: REST OF THE COUNTRY \ MODAL \ REST
COL0621 = COL - stratum 21: 21: REST OF THE COUNTRY \ NO MODAL \ COMPLETE
COL0622 = COL - stratum 22: 22: REST OF THE COUNTRY \ NO MODAL \ REST
CRI0003 = CRI - stratum 03: Public technical urban
CRI0004 = CRI - stratum 04: Public technical rural
CZE3030 = CZE - stratum 30: Voc-Tech-Conservatory with maturate
CZE3131 = CZE - stratum 31: Voc-Tech Secondary without maturate
DEU0101 = DEU - stratum 01: NOR\Baden-Württemberg (BW)
DEU0108 = DEU - stratum 08: NOR\Mecklenburg-Vorpommern (MV)
DEU0109 = DEU - stratum 09: NOR\Niedersachsen (NI)
DEU0210 = DEU - stratum 10: NOR\Nordrhein-Westfalen (NW)
DEU0211 = DEU - stratum 11: NOR\Rheinland-Pfalz (RP)
DEU0214 = DEU - stratum 14: NOR\Sachsen-Anhalt (ST)
DEU0215 = DEU - stratum 15: NOR\Schleswig-Holstein (SH)
DOM0003 = DOM - stratum 03: PUBLIC,URBAN,ISCED 3,School with modal grade -- 3
DOM0004 = DOM - stratum 04: PUBLIC,URBAN,ISCED 3,School with not modal grade -- 4
DOM0005 = DOM - stratum 05: PUBLIC,URBAN,MIXED,School with modal grade -- 5
DOM0009 = DOM - stratum 09: PUBLIC,RURAL,ISCED 3,School with modal grade -- 9
DOM0010 = DOM - stratum 10: PUBLIC,RURAL,ISCED 3,School with not modal grade -- 10
DOM0011 = DOM - stratum 11: PUBLIC,RURAL,MIXED,School with modal grade -- 11
DOM0015 = DOM - stratum 15: PRIVATE,URBAN,ISCED 3,School with modal grade -- 15
DOM0017 = DOM - stratum 17: PRIVATE,URBAN,MIXED,School with modal grade -- 17
DOM0018 = DOM - stratum 18: PRIVATE,URBAN,MIXED,School with not modal grade -- 18
DOM0022 = DOM - stratum 22: PRIVATE,RURAL,ISCED 3,School with not modal grade -- 22
DOM0023 = DOM - stratum 23: PRIVATE,RURAL,MIXED,School with modal grade -- 23
DOM0027 = DOM - stratum 27: SEMIOFICIAL,URBAN,ISCED 3,School with modal grade -- 27
DOM0028 = DOM - stratum 28: SEMIOFICIAL,URBAN,ISCED 3,School with not modal grade -- 28
DOM0029 = DOM - stratum 29: SEMIOFICIAL,URBAN,MIXED,School with modal grade -- 29
DOM0033 = DOM - stratum 33: SEMIOFICIAL,RURAL,ISCED 3,School with modal grade -- 33
DOM0035 = DOM - stratum 35: SEMIOFICIAL,RURAL,MIXED,School with modal grade -- 35
DOM0037 = DOM - stratum 37: 37,37,ISCED 2,School with not modal grade -- 37
DOM9797 = Undisclosed STRATUM - Dominican Republic
ESP0102 = ESP - stratum 02: Andalusia, private, NA
ESP0407 = ESP - stratum 07: Balearic Islands, public, NA
ESP0408 = ESP - stratum 08: Balearic Islands, private, NA
ESP0509 = ESP - stratum 09: Canary Islands, public, NA
ESP0510 = ESP - stratum 10: Canary Islands, private, NA
ESP0612 = ESP - stratum 12: Cantabria, private, NA
ESP0713 = ESP - stratum 13: Castile and Leon, public, NA
ESP0714 = ESP - stratum 14: Castile and Leon, private, NA
ESP0815 = ESP - stratum 15: Castile - La Mancha, public, NA
ESP0816 = ESP - stratum 16: Castile - La Mancha, private, NA
ESP0918 = ESP - stratum 18: Catalonia, private, NA
ESP1019 = ESP - stratum 19: Extremadura, public, NA
ESP1020 = ESP - stratum 20: Extremadura, private, NA
ESP1631 = ESP - stratum 31: Basque Country, public, A
ESP1632 = ESP - stratum 32: Basque Country, public, B
ESP1633 = ESP - stratum 33: Basque Country, public, D
ESP1634 = ESP - stratum 34: Basque Country, private, A
ESP1635 = ESP - stratum 35: Basque Country, private, B
ESP1636 = ESP - stratum 36: Basque Country, private, D
ESP9002 = ESP - stratum 02: Andalusia, private, NA
ESP9007 = ESP - stratum 07: Balearic Islands, public, NA
ESP9008 = ESP - stratum 08: Balearic Islands, private, NA
ESP9009 = ESP - stratum 09: Canary Islands, public, NA
ESP9010 = ESP - stratum 10: Canary Islands, private, NA
ESP9012 = ESP - stratum 12: Cantabria, private, NA
ESP9013 = ESP - stratum 13: Castile and Leon, public, NA
ESP9014 = ESP - stratum 14: Castile and Leon, private, NA
ESP9015 = ESP - stratum 15: Castile - La Mancha, public, NA
ESP9016 = ESP - stratum 16: Castile - La Mancha, private, NA
ESP9018 = ESP - stratum 18: Catalonia, private, NA
ESP9019 = ESP - stratum 19: Extremadura, public, NA
ESP9020 = ESP - stratum 20: Extremadura, private, NA
ESP9031 = ESP - stratum 31: Basque Country, public, A
ESP9032 = ESP - stratum 32: Basque Country, public, B
ESP9033 = ESP - stratum 33: Basque Country, public, D
ESP9034 = ESP - stratum 34: Basque Country, private, A
ESP9035 = ESP - stratum 35: Basque Country, private, B
ESP9036 = ESP - stratum 36: Basque Country, private, D
ESP9039 = ESP - stratum 39: Ceuta and Melilla, public, NA
ESP9040 = ESP - stratum 40: Ceuta and Melilla, private, NA
FIN0001 = FIN - stratum 01: Helsinki\Uusimaa-Urban
FIN0002 = FIN - stratum 02: Helsinki\Uusimaa-Rural
FIN0003 = FIN - stratum 03: Southern Finland-Urban
FIN0004 = FIN - stratum 04: Southern Finland-Rural
FIN0007 = FIN - stratum 07: Northern and Eastern Finland-Urban
FIN0008 = FIN - stratum 08: Northern and Eastern Finland-Rural
FIN0009 = FIN - stratum 09: Swedish speaking area-Urban
FIN0010 = FIN - stratum 10: Swedish speaking area-Rural
GBR0002 = QSC - stratum 02: pub fund-second lowest
GBR0004 = QSC - stratum 04: pub fund-second highest
GBR1101 = QUK - stratum 01: England,independent,North,male -- 1
GBR1102 = QUK - stratum 02: England,independent,North,mixed -- 2
GBR1103 = QUK - stratum 03: England,independent,North,female -- 3
GBR1104 = QUK - stratum 04: England,independent,Midlands,male -- 4
GBR1105 = QUK - stratum 05: England,independent,Midlands,mixed -- 5
GBR1106 = QUK - stratum 06: England,independent,Midlands,female -- 6
GBR1107 = QUK - stratum 07: England,independent,South,male -- 7
GBR1108 = QUK - stratum 08: England,independent,South,mixed -- 8
GBR1109 = QUK - stratum 09: England,independent,South,female -- 9
GBR1110 = QUK - stratum 10: England,independent,Greater London,male -- 10
GBR1111 = QUK - stratum 11: England,independent,Greater London,mixed -- 11
GBR1112 = QUK - stratum 12: England,independent,Greater London,female -- 12
GBR1113 = QUK - stratum 13: England,maintained selective,North,male -- 13
GBR1114 = QUK - stratum 14: England,maintained selective,North,mixed -- 14
GBR1115 = QUK - stratum 15: England,maintained selective,Midlands,male -- 15
GBR1116 = QUK - stratum 16: England,maintained selective,Midlands,mixed -- 16
GBR1117 = QUK - stratum 17: England,maintained selective,Midlands,female -- 17
GBR1118 = QUK - stratum 18: England,maintained selective,South,male -- 18
GBR1119 = QUK - stratum 19: England,maintained selective,South,mixed -- 19
GBR1120 = QUK - stratum 20: England,maintained selective,South,female -- 20
GBR1121 = QUK - stratum 21: England,maintained selective,Greater London,male -- 21
GBR1122 = QUK - stratum 22: England,maintained selective,Greater London,mixed -- 22
GBR1123 = QUK - stratum 23: England,maintained selective,Greater London,female -- 23
GBR1124 = QUK - stratum 24: England,maintained non-selective,North,male -- 24
GBR1125 = QUK - stratum 25: England,maintained non-selective,North,mixed -- 25
GBR1126 = QUK - stratum 26: England,maintained non-selective,North,female -- 26
GBR1127 = QUK - stratum 27: England,maintained non-selective,Midlands,male -- 27
GBR1128 = QUK - stratum 28: England,maintained non-selective,Midlands,mixed -- 28
GBR1129 = QUK - stratum 29: England,maintained non-selective,Midlands,female -- 29
GBR1130 = QUK - stratum 30: England,maintained non-selective,South,male -- 30
GBR1131 = QUK - stratum 31: England,maintained non-selective,South,mixed -- 31
GBR1132 = QUK - stratum 32: England,maintained non-selective,South,female -- 32
GBR1133 = QUK - stratum 33: England,maintained non-selective,Greater London,male -- 33
GBR1134 = QUK - stratum 34: England,maintained non-selective,Greater London,mixed -- 34
GBR1135 = QUK - stratum 35: England,maintained non-selective,Greater London,female -- 35
GBR1136 = QUK - stratum 36: England,academy,North,male -- 36
GBR1137 = QUK - stratum 37: England,academy,North,mixed -- 37
GBR1138 = QUK - stratum 38: England,academy,North,female -- 38
GBR1139 = QUK - stratum 39: England,academy,Midlands,male -- 39
GBR1140 = QUK - stratum 40: England,academy,Midlands,mixed -- 40
GBR1141 = QUK - stratum 41: England,academy,Midlands,female -- 41
GBR1142 = QUK - stratum 42: England,academy,South,male -- 42
GBR1143 = QUK - stratum 43: England,academy,South,mixed -- 43
GBR1144 = QUK - stratum 44: England,academy,South,female -- 44
GBR1145 = QUK - stratum 45: England,academy,Greater London,male -- 45
GBR1146 = QUK - stratum 46: England,academy,Greater London,mixed -- 46
GBR1147 = QUK - stratum 47: England,academy,Greater London,female -- 47
GBR1264 = QUK - stratum 64: Northern Ireland,independent,North Eastern,mixed -- 64
GBR1265 = QUK - stratum 65: Northern Ireland,independent,South Eastern,mixed -- 65
GBR1266 = QUK - stratum 66: Northern Ireland,independent,Southern,mixed -- 66
GBR1267 = QUK - stratum 67: Northern Ireland,maintained selective,Belfast,male -- 67
GBR1268 = QUK - stratum 68: Northern Ireland,maintained selective,Belfast,mixed -- 68
GBR1269 = QUK - stratum 69: Northern Ireland,maintained selective,Belfast,female -- 69
GBR1270 = QUK - stratum 70: Northern Ireland,maintained selective,Western,male -- 70
GBR1271 = QUK - stratum 71: Northern Ireland,maintained selective,Western,mixed -- 71
GBR1272 = QUK - stratum 72: Northern Ireland,maintained selective,Western,female -- 72
GBR1273 = QUK - stratum 73: Northern Ireland,maintained selective,North Eastern,male -- 73
GBR1274 = QUK - stratum 74: Northern Ireland,maintained selective,North Eastern,mixed -- 74
GBR1275 = QUK - stratum 75: Northern Ireland,maintained selective,North Eastern,female -- 75
GBR1276 = QUK - stratum 76: Northern Ireland,maintained selective,South Eastern,male -- 76
GBR1277 = QUK - stratum 77: Northern Ireland,maintained selective,South Eastern,mixed -- 77
GBR1278 = QUK - stratum 78: Northern Ireland,maintained selective,South Eastern,female -- 78
GBR1279 = QUK - stratum 79: Northern Ireland,maintained selective,Southern,male -- 79
GBR1280 = QUK - stratum 80: Northern Ireland,maintained selective,Southern,mixed -- 80
GBR1281 = QUK - stratum 81: Northern Ireland,maintained selective,Southern,female -- 81
GBR1282 = QUK - stratum 82: Northern Ireland,maintained non-selective,Belfast,male -- 82
GBR1283 = QUK - stratum 83: Northern Ireland,maintained non-selective,Belfast,mixed -- 83
GBR1284 = QUK - stratum 84: Northern Ireland,maintained non-selective,Belfast,female -- 84
GBR1285 = QUK - stratum 85: Northern Ireland,maintained non-selective,Western,male -- 85
GBR1286 = QUK - stratum 86: Northern Ireland,maintained non-selective,Western,mixed -- 86
GBR1287 = QUK - stratum 87: Northern Ireland,maintained non-selective,Western,female -- 87
GBR1288 = QUK - stratum 88: Northern Ireland,maintained non-selective,North Eastern,male -- 88
GBR1289 = QUK - stratum 89: Northern Ireland,maintained non-selective,North Eastern,mixed -- 89
GBR1290 = QUK - stratum 90: Northern Ireland,maintained non-selective,South Eastern,male -- 90
GBR1291 = QUK - stratum 91: Northern Ireland,maintained non-selective,South Eastern,mixed -- 91
GBR1292 = QUK - stratum 92: Northern Ireland,maintained non-selective,South Eastern,female -- 92
GBR1293 = QUK - stratum 93: Northern Ireland,maintained non-selective,Southern,male -- 93
GBR1294 = QUK - stratum 94: Northern Ireland,maintained non-selective,Southern,mixed -- 94
GBR1295 = QUK - stratum 95: Northern Ireland,maintained non-selective,Southern,female -- 95
GBR1348 = QUK - stratum 48: Wales,Maintained,North Wales,mixed -- 48
GBR1349 = QUK - stratum 49: Wales,Maintained,Powys & South West,male -- 49
GBR1350 = QUK - stratum 50: Wales,Maintained,Powys & South West,mixed -- 50
GBR1351 = QUK - stratum 51: Wales,Maintained,Powys & South West,female -- 51
GBR1352 = QUK - stratum 52: Wales,Maintained,South East Wales,mixed -- 52
GBR1353 = QUK - stratum 53: Wales,Maintained,South East Wales,female -- 53
GBR1354 = QUK - stratum 54: Wales,independent,North Wales,male -- 54
GBR1355 = QUK - stratum 55: Wales,independent,North Wales,mixed -- 55
GBR1356 = QUK - stratum 56: Wales,independent,North Wales,female -- 56
GBR1357 = QUK - stratum 57: Wales,independent,Powys & South West,male -- 57
GBR1358 = QUK - stratum 58: Wales,independent,Powys & South West,mixed -- 58
GBR1359 = QUK - stratum 59: Wales,independent,South East Wales,male -- 59
GBR1360 = QUK - stratum 60: Wales,independent,South East Wales,mixed -- 60
GBR1361 = QUK - stratum 61: Wales,independent,South East Wales,female -- 61
GBR1362 = QUK - stratum 62: Northern Ireland,independent,Belfast,mixed -- 62
GBR1363 = QUK - stratum 63: Northern Ireland,independent,Western,mixed -- 63
GEO0012 = GEO - stratum 12: Mtskheta-Mtianeti \ Public
GEO0013 = GEO - stratum 13: Mtskheta-Mtianeti \ Private
GEO0014 = GEO - stratum 14: Racha-Lechkhumi \ Public
GEO0015 = GEO - stratum 15: Racha-Lechkhumi \ Private
GEO0016 = GEO - stratum 16: Samegrelo-Zemo Svaneti \ Public
GEO0017 = GEO - stratum 17: Samegrelo-Zemo Svaneti \ Private
GEO0018 = GEO - stratum 18: Samtskhe-Javakheti \ Public
GEO0019 = GEO - stratum 19: Samtskhe-Javakheti \ Private
GEO0021 = GEO - stratum 21: Shida Qartli \ Private
GEO0023 = GEO - stratum 23: Qvemo Qartli \ Private
HKG0001 = HKG - stratum 01: Government\Modal grade
HKG0003 = HKG - stratum 03: Aided or Caput\Modal grade
HKG0004 = HKG - stratum 04: Aided or Caput\No modal grade
HKG0005 = HKG - stratum 05: Private or International\Modal grade
HKG0007 = HKG - stratum 07: Direct Subsidy Scheme\Modal grade
HRV0001 = HRV - stratum 01: Four year vocational prog
HRV0002 = HRV - stratum 02: Vocational - industrial - crafts prog.
HRV0006 = HRV - stratum 06: Primary schools (lower secondary education)
HUN0002 = HUN - stratum 02: Grammar school 1 (4-5 years long) -- 2
HUN0003 = HUN - stratum 03: Grammar school 2 (6 years long) -- 3
HUN0004 = HUN - stratum 04: Grammar school 3 (8 years long) -- 4
HUN0005 = HUN - stratum 05: Vocational secondary school -- 5
HUN0006 = HUN - stratum 06: Vocational school -- 6
IDN0001 = IDN - stratum 01: National Exam Result-Good
IDN0002 = IDN - stratum 02: National Exam Result-Moderate
IDN0003 = IDN - stratum 03: National Exam Result-Poor
IRL0001 = IRL - stratum 01: up to 40\community-comprehensive
IRL0002 = IRL - stratum 02: 41-80\community-comprehensive
IRL0003 = IRL - stratum 03: 81 and up\community-comprehensive
ISL0005 = ISL - stratum 05: Nágrenni Reykjavíkur \ 9-16
ISL0006 = ISL - stratum 06: Nágrenni Reykjavíkur \ 17-35
ISL0007 = ISL - stratum 07: Nágrenni Reykjavíkur \ > 35
ISL0017 = ISL - stratum 17: Norðurland vestra \ 1-8
ISL0018 = ISL - stratum 18: Norðurland vestra \ 9-16
ISL0019 = ISL - stratum 19: Norðurland vestra \17-35
ISL0020 = ISL - stratum 20: Norðurland vestra \ >35
ISL0021 = ISL - stratum 21: Norðurland eystra \ 1-8
ISL0022 = ISL - stratum 22: Norðurland eystra \ 9-16
ISL0023 = ISL - stratum 23: Norðurland eystra \ 17-35
ISL0024 = ISL - stratum 24: Norðurland eystra \ > 35
ISR0002 = ISR - stratum 02: Hebrew-religious-Female
ISR0008 = ISR - stratum 08: Hebrew-Ultra-Orthodox-Female
ISR0009 = ISR - stratum 09: Hebrew-Ultra-Orthodox-Male
ISR0010 = ISR - stratum 10: Hebrew-Ultra-Orthodox-Mix
ISR0011 = ISR - stratum 11: Apprenticeship institutions - Hebrew
ISR0012 = ISR - stratum 12: Apprenticeship institutions - Arabic
ITA0105 = ITA - stratum 05: Bolzano Formazione Professionale
ITA0308 = ITA - stratum 08: Campania Professionale
ITA0717 = ITA - stratum 17: Lombardia Professionale
ITA0719 = ITA - stratum 19: Lombardia Formazione Professionale
ITA1214 = ITA - stratum 14: Trento Formazione Professionale
ITA1324 = ITA - stratum 24: Other Formazione Professionale
ITA1331 = ITA - stratum 31: Basilicata Professionale
ITA1333 = ITA - stratum 33: F.V.G. slovenian Licei
ITA1334 = ITA - stratum 34: F.V.G. slovenian Tecnici
ITA1335 = ITA - stratum 35: F.V.G. slovenian Professionale
ITA1336 = ITA - stratum 36: F.V.G. slovenian Medie
ITA1337 = ITA - stratum 37: F.V.G. non slovenian Licei
ITA1338 = ITA - stratum 38: F.V.G. non slovenian Tecnici
ITA1339 = ITA - stratum 39: F.V.G. non slovenian Professionale
ITA1340 = ITA - stratum 40: F.V.G. non slovenian Medie
ITA1341 = ITA - stratum 41: F.V.G. non slovenian Formazione Professionale
ITA1346 = ITA - stratum 46: Abruzzo Formazione Professionale
ITA1351 = ITA - stratum 51: Liguria Formazione Professionale
ITA1356 = ITA - stratum 56: Marche Formazione Professionale
ITA1359 = ITA - stratum 59: Sardegna Professionale
ITA1363 = ITA - stratum 63: Valle d’Aosta Professionale
KAZ0101 = KAZ - stratum 01: Akmolinskaya oblast \ Kazakh \ non-intellectual
KAZ0102 = KAZ - stratum 02: Akmolinskaya oblast \ Russian \ non-intellectual
KAZ0103 = KAZ - stratum 03: Akmolinskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0104 = KAZ - stratum 04: Aktubinskaya oblast \ Kazakh \ non-intellectual
KAZ0105 = KAZ - stratum 05: Aktubinskaya oblast \ Russian \ non-intellectual
KAZ0106 = KAZ - stratum 06: Aktubinskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0107 = KAZ - stratum 07: Almatinskaya oblast \ Kazakh \ non-intellectual
KAZ0108 = KAZ - stratum 08: Almatinskaya oblast \ Russian \ non-intellectual
KAZ0109 = KAZ - stratum 09: Almatinskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0110 = KAZ - stratum 10: Atyrauskaya oblast \ Kazakh \ non-intellectual
KAZ0111 = KAZ - stratum 11: Atyrauskaya oblast \ Russian \ non-intellectual
KAZ0112 = KAZ - stratum 12: Atyrauskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0113 = KAZ - stratum 13: East-Kazakhstan oblast \ Kazakh \ non-intellectual
KAZ0114 = KAZ - stratum 14: East-Kazakhstan oblast \ Russian \ non-intellectual
KAZ0115 = KAZ - stratum 15: East-Kazakhstan oblast \ Kazakh\Russian \ non-intellectual
KAZ0116 = KAZ - stratum 16: Zhambylskaya oblast \ Kazakh \ non-intellectual
KAZ0117 = KAZ - stratum 17: Zhambylskaya oblast \ Russian \ non-intellectual
KAZ0118 = KAZ - stratum 18: Zhambylskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0119 = KAZ - stratum 19: West-Kazakhstan oblast \ Kazakh \ non-intellectual
KAZ0120 = KAZ - stratum 20: West-Kazakhstan oblast \ Russian \ non-intellectual
KAZ0121 = KAZ - stratum 21: West-Kazakhstan oblast \ Kazakh\Russian \ non-intellectual
KAZ0122 = KAZ - stratum 22: Karagandinskaya oblast \ Kazakh \ non-intellectual
KAZ0123 = KAZ - stratum 23: Karagandinskaya oblast \ Russian \ non-intellectual
KAZ0124 = KAZ - stratum 24: Karagandinskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0125 = KAZ - stratum 25: Kostanayskaya oblast \ Kazakh \ non-intellectual
KAZ0126 = KAZ - stratum 26: Kostanayskaya oblast \ Russian \ non-intellectual
KAZ0127 = KAZ - stratum 27: Kostanayskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0128 = KAZ - stratum 28: Kyzyl-Ordinskaya oblast \ Kazakh \ non-intellectual
KAZ0129 = KAZ - stratum 29: Kyzyl-Ordinskaya oblast \ Russian \ non-intellectual
KAZ0130 = KAZ - stratum 30: Kyzyl-Ordinskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0131 = KAZ - stratum 31: Mangystauskaya oblast \ Kazakh \ non-intellectual
KAZ0132 = KAZ - stratum 32: Mangystauskaya oblast \ Russian \ non-intellectual
KAZ0133 = KAZ - stratum 33: Mangystauskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0134 = KAZ - stratum 34: Pavlodarskaya oblast \ Kazakh \ non-intellectual
KAZ0135 = KAZ - stratum 35: Pavlodarskaya oblast \ Russian \ non-intellectual
KAZ0136 = KAZ - stratum 36: Pavlodarskaya oblast \ Kazakh\Russian \ non-intellectual
KAZ0137 = KAZ - stratum 37: North-Kazakhstan oblast \ Kazakh \ non-intellectual
KAZ0138 = KAZ - stratum 38: North-Kazakhstan oblast \ Russian \ non-intellectual
KAZ0139 = KAZ - stratum 39: North-Kazakhstan oblast \ Kazakh\Russian \ non-intellectual
KAZ0140 = KAZ - stratum 40: South-Kazakhstan oblast \ Kazakh \ non-intellectual
KAZ0141 = KAZ - stratum 41: South-Kazakhstan oblast \ Russian \ non-intellectual
KAZ0142 = KAZ - stratum 42: South-Kazakhstan oblast \ Kazakh\Russian \ non-intellectual
KAZ0143 = KAZ - stratum 43: Almaty city \ Kazakh \ non-intellectual
KAZ0144 = KAZ - stratum 44: Almaty city \ Russian \ non-intellectual
KAZ0145 = KAZ - stratum 45: Almaty city \ Kazakh\Russian \ non-intellectual
KAZ0146 = KAZ - stratum 46: Astana city \ Kazakh \ non-intellectual
KAZ0147 = KAZ - stratum 47: Astana city \ Russian \ non-intellectual
KAZ0148 = KAZ - stratum 48: Astana city \ Kazakh\Russian \ non-intellectual
KAZ0249 = KAZ - stratum 49: N\A \ Kazakh\Russian \ intellectual
KOR0101 = KOR - stratum 01: Lower Secondary,General -- 01
KOR0202 = KOR - stratum 02: Upper Secondary,general -- 02
KOR0302 = KOR - stratum 02: Upper Secondary,general -- 02
KOR0403 = KOR - stratum 03: Upper Secondary,vocational -- 03
LBN0001 = LBN - stratum 01: ISCED2AG,Private,Rural -- 1
LBN0002 = LBN - stratum 02: ISCED2AG,Private,Urban -- 2
LBN0003 = LBN - stratum 03: ISCED2AG,Public,Rural -- 3
LBN0004 = LBN - stratum 04: ISCED2AG,Public,Urban -- 4
LBN0005 = LBN - stratum 05: MIXED,Private,Rural -- 5
LBN0006 = LBN - stratum 06: MIXED,Private,Urban -- 6
LBN0007 = LBN - stratum 07: MIXED,Public,Rural -- 7
LBN0008 = LBN - stratum 08: MIXED,Public,Urban -- 8
LBN0009 = LBN - stratum 09: ISCED3AG,Private,Rural -- 9
LBN0010 = LBN - stratum 10: ISCED3AG,Private,Urban -- 10
LBN0011 = LBN - stratum 11: ISCED3AG,Public,Rural -- 11
LBN0012 = LBN - stratum 12: ISCED3AG,Public,Urban -- 12
LTU0101 = LTU - stratum 01: Lithuanian \ Capital \ Gymnasium
LTU0102 = LTU - stratum 02: Lithuanian \ Capital \ Secondary
LTU0103 = LTU - stratum 03: Lithuanian \ Capital \ basic
LTU0104 = LTU - stratum 04: Lithuanian \ Capital \ progymnasium
LTU0105 = LTU - stratum 05: Lithuanian \ Capital \ other
LTU0106 = LTU - stratum 06: Lithuanian \ City \ Gymnasium
LTU0107 = LTU - stratum 07: Lithuanian \ City \ Secondary
LTU0108 = LTU - stratum 08: Lithuanian \ City \ basic
LTU0109 = LTU - stratum 09: Lithuanian \ City \ progymnasium
LTU0110 = LTU - stratum 10: Lithuanian \ City \ other
LTU0111 = LTU - stratum 11: Lithuanian \ town \ Gymnasium
LTU0112 = LTU - stratum 12: Lithuanian \ town \ Secondary
LTU0113 = LTU - stratum 13: Lithuanian \ town \ basic
LTU0114 = LTU - stratum 14: Lithuanian \ town \ progymnasium
LTU0115 = LTU - stratum 15: Lithuanian \ town \ other
LTU0116 = LTU - stratum 16: Lithuanian \ village \ Gymnasium
LTU0117 = LTU - stratum 17: Lithuanian \ village \ Secondary
LTU0118 = LTU - stratum 18: Lithuanian \ village \ basic
LTU0119 = LTU - stratum 19: Lithuanian \ village \ progymnasium
LTU0120 = LTU - stratum 20: Lithuanian \ village \ other
LTU0423 = LTU - stratum 23: Russian, Polish \ NA \ NA
LTU0524 = LTU - stratum 24: Other multi-language \ NA \ NA
LUX0101 = LUX - stratum 01: 1: ES government public
LUX0102 = LUX - stratum 02: 2: EST government public
LUX0103 = LUX - stratum 03: 3: ES+EST government public
LUX0104 = LUX - stratum 04: 4: EST government private
LUX0105 = LUX - stratum 05: 5: ES+EST government private
LUX0106 = LUX - stratum 06: 6: Government independent
MAC0001 = MAC - stratum 01: Government, Grammar-International, Chinese and Portuguese
MAC0002 = MAC - stratum 02: Government, Technical-Vocational, Chinese
MAC0003 = MAC - stratum 03: Private-in-Net, Grammar-International, Chinese
MAC0004 = MAC - stratum 04: Private-in-Net, Grammar-International, English
MAC0005 = MAC - stratum 05: Private-in-Net, Grammar-International, Chinese and English
MAC0006 = MAC - stratum 06: Private-in-Net, Technical-Vocational, Chinese
MAC0007 = MAC - stratum 07: Private-not- in-Net, Grammar-International, Chinese
MAC0008 = MAC - stratum 08: Private-not-in-Net, Grammar-International, English
MAC0009 = MAC - stratum 09: Private-not-in-Net, Grammar-International, Portuguese
MAC0010 = MAC - stratum 10: Private-not- in-Net, Grammar-International, Chinese and English
MDA0001 = MDA - stratum 01: Romanian\Big city\Mixed
MDA0002 = MDA - stratum 02: Romanian\Big city\ISCED2
MDA0003 = MDA - stratum 03: Romanian\Big city\ISCED3
MDA0010 = MDA - stratum 10: Russian\Big city\Mixed
MDA0011 = MDA - stratum 11: Russian\Big city\ISCED2
MDA0012 = MDA - stratum 12: Russian\Big city\ISCED3
MEX0001 = MEX - stratum 01: Lower Secondary \ Large
MEX0002 = MEX - stratum 02: Lower Secondary \ Moderately Small
MEX0003 = MEX - stratum 03: Lower Secondary \ Small
MEX0004 = MEX - stratum 04: Upper Secondary \ Large
MEX0005 = MEX - stratum 05: Upper Secondary \ Moderately Small
MEX0006 = MEX - stratum 06: Upper Secondary \ Small
MLT0004 = MLT - stratum 04: State \ Category A + Category B
MLT0005 = MLT - stratum 05: State \ Category A+ Category B + Category C
MLT0006 = MLT - stratum 06: State \ Category A + Category C
MLT0007 = MLT - stratum 07: State \ Category B + Category C
MYS0101 = MYS - stratum 01: MOE National Secondary School\Other States
MYS0202 = MYS - stratum 02: MOE Religious School\Other States
MYS0203 = MYS - stratum 03: MOE Technical School\Other States
MYS0204 = MYS - stratum 04: MOE Fully Residential School
MYS0205 = MYS - stratum 05: non-MOE MARA Junior Science College\Other States
MYS0206 = MYS - stratum 06: non-MOE Other Schools\Other States
MYS0207 = MYS - stratum 07: Perlis non-“MOE Fully Residential Schools”
MYS0208 = MYS - stratum 08: Wilayah Persekutuan Putrajaya non-“MOE Fully Residential Schools”
MYS0209 = MYS - stratum 09: Wilayah Persekutuan Labuan non-“MOE Fully Residential Schools”
NOR0001 = NOR - stratum 01: Lower secondary schools
NOR0002 = NOR - stratum 02: Upper secondary schools
PER0001 = PER - stratum 01: Public\Urban\Modal grade
PER0002 = PER - stratum 02: Public\Urban\No modal grade
PER0003 = PER - stratum 03: Public\Rural\Modal grade
PER0004 = PER - stratum 04: Public\Rural\No modal grade
PER0005 = PER - stratum 05: Private\Urban\Modal grade
PER0006 = PER - stratum 06: Private\Urban\No modal grade
PER0007 = PER - stratum 07: Private\Rural\Modal grade
PER0008 = PER - stratum 08: Private\Rural\No modal grade
PRT0001 = PRT - stratum 01: Alentejo Central,Modal Grade -- 1
PRT0002 = PRT - stratum 02: Alentejo Central,Non Modal grade -- 2
PRT0003 = PRT - stratum 03: Alentejo Litoral,Modal Grade -- 3
PRT0004 = PRT - stratum 04: Alentejo Litoral,Non Modal grade -- 4
PRT0005 = PRT - stratum 05: Algarve,Modal Grade -- 5
PRT0006 = PRT - stratum 06: Algarve,Non Modal grade -- 6
PRT0007 = PRT - stratum 07: Alto Alentejo,Modal Grade -- 7
PRT0008 = PRT - stratum 08: Alto Alentejo,Non Modal grade -- 8
PRT0009 = PRT - stratum 09: Alto Minho,Modal Grade -- 9
PRT0010 = PRT - stratum 10: Alto Minho,Non Modal grade -- 10
PRT0011 = PRT - stratum 11: Alto Tâmega,Modal Grade -- 11
PRT0012 = PRT - stratum 12: Alto Tâmega,Non Modal grade -- 12
PRT0013 = PRT - stratum 13: Área Metropolitana de Lisboa,Modal Grade -- 13
PRT0014 = PRT - stratum 14: Área Metropolitana de Lisboa,Non Modal grade -- 14
PRT0015 = PRT - stratum 15: Área Metropolitana do Porto,Modal Grade -- 15
PRT0016 = PRT - stratum 16: Área Metropolitana do Porto,Non Modal grade -- 16
PRT0018 = PRT - stratum 18: Ave,Non Modal grade -- 18
PRT0019 = PRT - stratum 19: Baixo Alentejo,Modal Grade -- 19
PRT0020 = PRT - stratum 20: Baixo Alentejo,Non Modal grade -- 20
PRT0021 = PRT - stratum 21: Beira Baixa,Modal Grade -- 21
PRT0022 = PRT - stratum 22: Beira Baixa,Non Modal grade -- 22
PRT0023 = PRT - stratum 23: Beiras e Serra da Estrela,Modal Grade -- 23
PRT0024 = PRT - stratum 24: Beiras e Serra da Estrela,Non Modal grade -- 24
PRT0025 = PRT - stratum 25: Cávado,Modal Grade -- 25
PRT0026 = PRT - stratum 26: Cávado,Non Modal grade -- 26
PRT0027 = PRT - stratum 27: Douro,Modal Grade -- 27
PRT0028 = PRT - stratum 28: Douro,Non Modal grade -- 28
PRT0029 = PRT - stratum 29: Lezíria do Tejo,Modal Grade -- 29
PRT0030 = PRT - stratum 30: Lezíria do Tejo,Non Modal grade -- 30
PRT0031 = PRT - stratum 31: Médio Tejo,Modal Grade -- 31
PRT0032 = PRT - stratum 32: Médio Tejo,Non Modal grade -- 32
PRT0033 = PRT - stratum 33: Oeste,Modal Grade -- 33
PRT0034 = PRT - stratum 34: Oeste,Non Modal grade -- 34
PRT0035 = PRT - stratum 35: R. A. Madeira,Modal Grade -- 35
PRT0036 = PRT - stratum 36: R. A. Madeira,Non Modal grade -- 36
PRT0037 = PRT - stratum 37: R. A. Açores,Modal Grade -- 37
PRT0038 = PRT - stratum 38: R. A. Açores,Non Modal grade -- 38
PRT0039 = PRT - stratum 39: Região de Aveiro,Modal Grade -- 39
PRT0040 = PRT - stratum 40: Região de Aveiro,Non Modal grade -- 40
PRT0041 = PRT - stratum 41: Região de Coimbra,Modal Grade -- 41
PRT0042 = PRT - stratum 42: Região de Coimbra,Non Modal grade -- 42
PRT0043 = PRT - stratum 43: Região de Leiria,Modal Grade -- 43
PRT0044 = PRT - stratum 44: Região de Leiria,Non Modal grade -- 44
PRT0045 = PRT - stratum 45: Tâmega e Sousa,Modal Grade -- 45
PRT0046 = PRT - stratum 46: Tâmega e Sousa,Non Modal grade -- 46
PRT0047 = PRT - stratum 47: Terras de Trás-os-Montes,Modal Grade -- 47
PRT0048 = PRT - stratum 48: Terras de Trás-os-Montes,Non Modal grade -- 48
PRT0049 = PRT - stratum 49: Viseu Dão Lafões,Modal Grade -- 49
PRT0050 = PRT - stratum 50: Viseu Dão Lafões,Non Modal grade -- 50
QAT0102 = QAT - region 01 stratum 02: Independent complex
QAT0104 = QAT - region 01 stratum 04: International
QAT0106 = QAT - region 01 stratum 06: Private complex
QAT0202 = QAT - region 02 stratum 02: Independent complex
QAT0204 = QAT - region 02 stratum 04: International
QAT0206 = QAT - region 02 stratum 06: Private complex
QCH0101 = QCH - stratum 01: Beijing_Fangshan\Rural\Academic\ISCED2
QCH0102 = QCH - stratum 02: Beijing_Fangshan\Rural\Academic\ISCED3
QCH0103 = QCH - stratum 03: Beijing_Fangshan\Rural\Academic\Mixed
QCH0104 = QCH - stratum 04: Beijing_Fangshan\Rural\Vocational\ISCED3
QCH0105 = QCH - stratum 05: Beijing_Fangshan\Town\Academic\ISCED2
QCH0106 = QCH - stratum 06: Beijing_Fangshan\Town\Academic\ISCED3
QCH0107 = QCH - stratum 07: Beijing_Fangshan\Town\Academic\Mixed
QCH0108 = QCH - stratum 08: Beijing_Fangshan\Town\Vocational\ISCED3
QCH0209 = QCH - stratum 09: Beijing_other\City\Academic\ISCED2
QCH0210 = QCH - stratum 10: Beijing_other\City\Academic\ISCED3
QCH0211 = QCH - stratum 11: Beijing_other\City\Academic\Mixed
QCH0212 = QCH - stratum 12: Beijing_other\City\Vocational\ISCED3
QCH0213 = QCH - stratum 13: Beijing_other\Rural\Academic\ISCED2
QCH0214 = QCH - stratum 14: Beijing_other\Rural\Academic\ISCED3
QCH0215 = QCH - stratum 15: Beijing_other\Rural\Academic\Mixed
QCH0216 = QCH - stratum 16: Beijing_other\Town\Academic\ISCED2
QCH0217 = QCH - stratum 17: Beijing_other\Town\Academic\ISCED3
QCH0218 = QCH - stratum 18: Beijing_other\Town\Academic\Mixed
QCH0219 = QCH - stratum 19: Beijing_other\Town\Vocational\ISCED3
QCH0320 = QCH - stratum 20: Guangdong\City\Academic\ISCED2
QCH0321 = QCH - stratum 21: Guangdong \City\Academic\ISCED3
QCH0322 = QCH - stratum 22: Guangdong\City\Academic\Mixed
QCH0323 = QCH - stratum 23: Guangdong \City\Vocational\ISCED3
QCH0324 = QCH - stratum 24: Guangdong\Rural\Academic\ISCED2
QCH0325 = QCH - stratum 25: Guangdong \Rural\Academic\ISCED3
QCH0326 = QCH - stratum 26: Guangdong\Rural\Academic\Mixed
QCH0327 = QCH - stratum 27: Guangdong \Rural\Vocational\ISCED3
QCH0328 = QCH - stratum 28: Guangdong\Town\Academic\ISCED2
QCH0329 = QCH - stratum 29: Guangdong \Town\Academic\ISCED3
QCH0330 = QCH - stratum 30: Guangdong\Town\Academic\Mixed
QCH0331 = QCH - stratum 31: Guangdong \Town\Vocational\ISCED3
QCH0432 = QCH - stratum 32: Jiangsu\City\Academic\ISCED2
QCH0433 = QCH - stratum 33: Jiangsu \City\Academic\ISCED3
QCH0434 = QCH - stratum 34: Jiangsu\City\Academic\Mixed
QCH0435 = QCH - stratum 35: Jiangsu \City\Vocational\ISCED3
QCH0436 = QCH - stratum 36: Jiangsu\Rural\Academic\ISCED2
QCH0437 = QCH - stratum 37: Jiangsu \Rural\Academic\ISCED3
QCH0438 = QCH - stratum 38: Jiangsu\Rural\Academic\Mixed
QCH0439 = QCH - stratum 39: Jiangsu \Rural\Vocational\ISCED3
QCH0440 = QCH - stratum 40: Jiangsu\Town\Academic\ISCED2
QCH0441 = QCH - stratum 41: Jiangsu \Town\Academic\ISCED3
QCH0442 = QCH - stratum 42: Jiangsu\Town\Academic\Mixed
QCH0443 = QCH - stratum 43: Jiangsu \Town\Vocational\ISCED3
QCH0544 = QCH - stratum 44: Shanghai\City\Academic\ISCED2
QCH0545 = QCH - stratum 45: Shanghai \City\Academic\ISCED3
QCH0546 = QCH - stratum 46: Shanghai\City\Academic\Mixed
QCH0547 = QCH - stratum 47: Shanghai \City\Vocational\ISCED3
QCH0548 = QCH - stratum 48: Shanghai\Rural\Academic\ISCED2
QCH0549 = QCH - stratum 49: Shanghai \Rural\Academic\ISCED3
QCH0550 = QCH - stratum 50: Shanghai\Rural\Academic\Mixed
QCH0551 = QCH - stratum 51: Shanghai\Town\Academic\ISCED2
QCH0552 = QCH - stratum 52: Shanghai \Town\Academic\ISCED3
QCH0553 = QCH - stratum 53: Shanghai\Town\Academic\Mixed
QCY0001 = QCY - stratum 01: General,Public,Urban -- 1
QCY0002 = QCY - stratum 02: General,Public,Rural -- 2
QCY0003 = QCY - stratum 03: General,Private,Urban -- 3
QCY0004 = QCY - stratum 04: General,Private,Rural -- 4
QCY0005 = QCY - stratum 05: Vocational,Public,Urban -- 5
QCY0006 = QCY - stratum 06: Vocational,Public,Rural -- 6
QCY0007 = QCY - stratum 07: Vocational,Private,Urban -- 7
QCY0008 = QCY - stratum 08: Mixed,Public,Rural -- 8
QES0102 = QES - stratum 02: Andalusia, private, NA
QES0407 = QES - stratum 07: Balearic Islands, public, NA
QES0408 = QES - stratum 08: Balearic Islands, private, NA
QES0509 = QES - stratum 09: Canary Islands, public, NA
QES0510 = QES - stratum 10: Canary Islands, private, NA
QES0612 = QES - stratum 12: Cantabria, private, NA
QES0713 = QES - stratum 13: Castile and Leon, public, NA
QES0714 = QES - stratum 14: Castile and Leon, private, NA
QES0815 = QES - stratum 15: Castile - La Mancha, public, NA
QES0816 = QES - stratum 16: Castile - La Mancha, private, NA
QES0918 = QES - stratum 18: Catalonia, private, NA
QES1019 = QES - stratum 19: Extremadura, public, NA
QES1020 = QES - stratum 20: Extremadura, private, NA
QES1631 = QES - stratum 31: Basque Country, public, A
QES1632 = QES - stratum 32: Basque Country, public, B
QES1633 = QES - stratum 33: Basque Country, public, D
QES1634 = QES - stratum 34: Basque Country, private, A
QES1635 = QES - stratum 35: Basque Country, private, B
QES1636 = QES - stratum 36: Basque Country, private, D
QES9002 = QES - stratum 02: Andalusia, private, NA
QES9007 = QES - stratum 07: Balearic Islands, public, NA
QES9008 = QES - stratum 08: Balearic Islands, private, NA
QES9009 = QES - stratum 09: Canary Islands, public, NA
QES9010 = QES - stratum 10: Canary Islands, private, NA
QES9012 = QES - stratum 12: Cantabria, private, NA
QES9013 = QES - stratum 13: Castile and Leon, public, NA
QES9014 = QES - stratum 14: Castile and Leon, private, NA
QES9015 = QES - stratum 15: Castile - La Mancha, public, NA
QES9016 = QES - stratum 16: Castile - La Mancha, private, NA
QES9018 = QES - stratum 18: Catalonia, private, NA
QES9019 = QES - stratum 19: Extremadura, public, NA
QES9020 = QES - stratum 20: Extremadura, private, NA
QES9031 = QES - stratum 31: Basque Country, public, A
QES9032 = QES - stratum 32: Basque Country, public, B
QES9033 = QES - stratum 33: Basque Country, public, D
QES9034 = QES - stratum 34: Basque Country, private, A
QES9035 = QES - stratum 35: Basque Country, private, B
QES9036 = QES - stratum 36: Basque Country, private, D
QES9039 = QES - stratum 39: Ceuta and Melilla, public, NA
QES9040 = QES - stratum 40: Ceuta and Melilla, private, NA
QUD0410 = QUD - stratum 10: Puerto Rico Private (USA)
QUD0411 = QUD - stratum 11: Puerto Rico Public (USA)
RUS0003 = RUS - stratum 03: Republic of Bashkortostan
RUS0007 = RUS - stratum 07: Kabardino-Balkarian Republic
RUS0014 = RUS - stratum 14: Republic of Sakha (Yakutia)
RUS0052 = RUS - stratum 52: Nizhni Novgorod region
RUS0078 = RUS - stratum 78: The City of Sankt-Petersburg
RUS0086 = RUS - stratum 86: Khanty-Mansijsk autonomous district - Yugra
RUS0089 = RUS - stratum 89: Yamalo-Nenets autonomous district
RUS9797 = Undisclosed STRATUM - Russian Federation
SVK0009 = SVK - stratum 09: others \ Region 3_ VÝCH
SVN0101 = SVN - stratum 01: GIMg - gymnasia general
SVN0102 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0103 = SVN - stratum 03: STSI - technical educational programmes
SVN0104 = SVN - stratum 04: SPI - vocational of medium duration
SVN0105 = SVN - stratum 05: NPI - vocational of short duration
SVN0201 = SVN - stratum 01: GIMg - gymnasia general
SVN0202 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0203 = SVN - stratum 03: STSI - technical educational programmes
SVN0204 = SVN - stratum 04: SPI - vocational of medium duration
SVN0205 = SVN - stratum 05: NPI - vocational of short duration
SVN0301 = SVN - stratum 01: GIMg - gymnasia general
SVN0302 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0303 = SVN - stratum 03: STSI - technical educational programmes
SVN0304 = SVN - stratum 04: SPI - vocational of medium duration
SVN0305 = SVN - stratum 05: NPI - vocational of short duration
SVN0401 = SVN - stratum 01: GIMg - gymnasia general
SVN0403 = SVN - stratum 03: STSI - technical educational programmes
SVN0404 = SVN - stratum 04: SPI - vocational of medium duration
SVN0405 = SVN - stratum 05: NPI - vocational of short duration
SVN0501 = SVN - stratum 01: GIMg - gymnasia general
SVN0503 = SVN - stratum 03: STSI - technical educational programmes
SVN0504 = SVN - stratum 04: SPI - vocational of medium duration
SVN0505 = SVN - stratum 05: NPI - vocational of short duration
SVN0601 = SVN - stratum 01: GIMg - gymnasia general
SVN0602 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0603 = SVN - stratum 03: STSI - technical educational programmes
SVN0604 = SVN - stratum 04: SPI - vocational of medium duration
SVN0605 = SVN - stratum 05: NPI - vocational of short duration
SVN0701 = SVN - stratum 01: GIMg - gymnasia general
SVN0702 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0703 = SVN - stratum 03: STSI - technical educational programmes
SVN0704 = SVN - stratum 04: SPI - vocational of medium duration
SVN0705 = SVN - stratum 05: NPI - vocational of short duration
SVN0801 = SVN - stratum 01: GIMg - gymnasia general
SVN0802 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0803 = SVN - stratum 03: STSI - technical educational programmes
SVN0804 = SVN - stratum 04: SPI - vocational of medium duration
SVN0805 = SVN - stratum 05: NPI - vocational of short duration
SVN0901 = SVN - stratum 01: GIMg - gymnasia general
SVN0902 = SVN - stratum 02: GIMs - gymnasia specialist
SVN0903 = SVN - stratum 03: STSI - technical educational programmes
SVN0904 = SVN - stratum 04: SPI - vocational of medium duration
SVN0905 = SVN - stratum 05: NPI - vocational of short duration
SVN1001 = SVN - stratum 01: GIMg - gymnasia general
SVN1002 = SVN - stratum 02: GIMs - gymnasia specialist
SVN1003 = SVN - stratum 03: STSI - technical educational programmes
SVN1004 = SVN - stratum 04: SPI - vocational of medium duration
SVN1005 = SVN - stratum 05: NPI - vocational of short duration
SVN1101 = SVN - stratum 01: GIMg - gymnasia general
SVN1102 = SVN - stratum 02: GIMs - gymnasia specialist
SVN1103 = SVN - stratum 03: STSI - technical educational programmes
SVN1104 = SVN - stratum 04: SPI - vocational of medium duration
SVN1105 = SVN - stratum 05: NPI - vocational of short duration
SVN1201 = SVN - stratum 01: GIMg - gymnasia general
SVN1203 = SVN - stratum 03: STSI - technical educational programmes
SVN1204 = SVN - stratum 04: SPI - vocational of medium duration
SVN1205 = SVN - stratum 05: NPI - vocational of short duration
SVN9006 = SVN - stratum 06: OS - elementary school
SVN9007 = SVN - stratum 07: IO - adult educational programme
SWE0002 = SWE - stratum 02: PUB\LOWER SEC\LARGE CITIES
SWE0005 = SWE - stratum 05: INDEP\LOWER and mixed ISCED2 & ISCED3\METRO
SWE0006 = SWE - stratum 06: INDEP\LOWER SEC\LARGE CITIES
TAP0101 = TAP - stratum 01: general junior high school (1) \ Public (0)
TAP0102 = TAP - stratum 02: general junior high school (1) \ Private (1)
TAP0103 = TAP - stratum 03: general senior high school (2) \ Public (0)
TAP0104 = TAP - stratum 04: general senior high school (2) \ Private (1)
TAP0205 = TAP - stratum 05: vocational senior high school (3) \ Public (0)
TAP0206 = TAP - stratum 06: vocational senior high school (3) \ Private (1)
TAP0207 = TAP - stratum 07: mixed general and vocational senior high school (4) \ Public (0)
TAP0208 = TAP - stratum 08: mixed general and vocational senior high school (4) \ Private (1)
TAP0309 = TAP - stratum 09: comprehensive high school (5) \ Public (0)
TAP0310 = TAP - stratum 10: comprehensive high school (5) \ Private (1)
TAP0311 = TAP - stratum 11: five-year college (6) \ Public (0)
TAP0312 = TAP - stratum 12: five-year college (6) \ Private (1)
THA0101 = THA - stratum 01: OBEC,ISCED2 only -- 01
THA0103 = THA - stratum 03: OBEC,ISCED3 only -- 03
THA0204 = THA - stratum 04: OPEC,ISCED2 only -- 04
THA0206 = THA - stratum 06: OPEC,ISCED3 only -- 06
THA0207 = THA - stratum 07: DBMA,ISCED2 only -- 07
THA0209 = THA - stratum 09: BLDC,ISCED2 only -- 09
THA0211 = THA - stratum 11: BLDC,ISCED3 only -- 11
THA0212 = THA - stratum 12: OHEC,ISCED2 only -- 12
THA0214 = THA - stratum 14: OVEC,ISCED3 only -- 14
THA0216 = THA - stratum 16: SSMS,ISCED3 only -- 16
TTO0005 = TTO - stratum 05: North Eastern\Religious
TTO0008 = TTO - stratum 08: Port of Spain\Religious
TTO0010 = TTO - stratum 10: St. George East\Secular
TTO0011 = TTO - stratum 11: St. George East\Religious
TTO0012 = TTO - stratum 12: St. George East\Private
TTO0017 = TTO - stratum 17: South Eastern\Religious
TTO9797 = Undisclosed STRATUM - Trinidad and Tobago
TUR0103 = TUR - stratum 03: TR1 VOCATIONAL AND TECHNICAL SECONDARY
TUR0106 = TUR - stratum 06: TR2 VOCATIONAL AND TECHNICAL SECONDARY
TUR0109 = TUR - stratum 09: TR3 VOCATIONAL AND TECHNICAL SECONDARY
TUR0112 = TUR - stratum 12: TR4 VOCATIONAL AND TECHNICAL SECONDARY
TUR0215 = TUR - stratum 15: TR5 VOCATIONAL AND TECHNICAL SECONDARY
TUR0218 = TUR - stratum 18: TR6 VOCATIONAL AND TECHNICAL SECONDARY
TUR0221 = TUR - stratum 21: TR7 VOCATIONAL AND TECHNICAL SECONDARY
TUR0224 = TUR - stratum 24: TR8 VOCATIONAL AND TECHNICAL SECONDARY
TUR0227 = TUR - stratum 27: TR9 VOCATIONAL AND TECHNICAL SECONDARY
TUR0230 = TUR - stratum 30: TRA VOCATIONAL AND TECHNICAL SECONDARY
TUR0233 = TUR - stratum 33: TRB VOCATIONAL AND TECHNICAL SECONDARY
TUR0236 = TUR - stratum 36: TRC VOCATIONAL AND TECHNICAL SECONDARY
URY0001 = URY - stratum 01: Pub. Gen. Sec \ Lower secondary
URY0003 = URY - stratum 03: Pub. Gen. Sec \Upper Secondary
URY0004 = URY - stratum 04: Pri. Gen. Sec \ Lower secondary
URY0006 = URY - stratum 06: Pri. Gen. Sec \Upper Secondary
URY0007 = URY - stratum 07: Pub. Tech. Sec \ Lower secondary
URY0008 = URY - stratum 08: Pub. Tech. Sec \ Mixed
URY0009 = URY - stratum 09: Pub. Tech. Sec \Upper Secondary
URY0010 = URY - stratum 10: Rur. w. lower sec. degree \ Lower secondary
USA0102 = USA - stratum 02: USA Northeast Public, has gr10
USA0104 = USA - stratum 04: USA Midwest Public, has gr10
USA0206 = USA - stratum 06: USA South Public, has gr10
USA0308 = USA - stratum 08: USA West Public, has gr10
USA0309 = USA - stratum 09: USA Public, no grade 10
VNM0101 = VNM - stratum 01: Northern Vietnam,>50% public funding,Urban
VNM0102 = VNM - stratum 02: Northern Vietnam,>50% public funding,Rural
VNM0103 = VNM - stratum 03: Northern Vietnam,>50% public funding,Remote area
VNM0104 = VNM - stratum 04: Northern Vietnam,<50% public funding,Urban
VNM0105 = VNM - stratum 05: Northern Vietnam,<50% public funding,Rural
VNM0207 = VNM - stratum 07: Central Vietnam,>50% public funding,Urban
VNM0208 = VNM - stratum 08: Central Vietnam,>50% public funding,Rural
VNM0209 = VNM - stratum 09: Central Vietnam,>50% public funding,Remote area
VNM0210 = VNM - stratum 10: Central Vietnam,<50% public funding,Urban
VNM0211 = VNM - stratum 11: Central Vietnam,<50% public funding,Rural
VNM0313 = VNM - stratum 13: Southern Vietnam,>50% public funding,Urban
VNM0314 = VNM - stratum 14: Southern Vietnam,>50% public funding,Rural
VNM0315 = VNM - stratum 15: Southern Vietnam,>50% public funding,Remote area
VNM0316 = VNM - stratum 16: Southern Vietnam,<50% public funding,Urban
VNM0317 = VNM - stratum 17: Southern Vietnam,<50% public funding,Rural

Adjudicated sub-region code 7-digit code (3-digit country code + region ID + stratum ID)
7840000 = United Arab Emirates - Rest of the country

OECD country
0 = No
1 = Yes
2 = Not Applicable

Mode of Respondent
1 = Paper
2 = Computer

Collaborative Problem Solving Option
0 = No
1 = Yes

Reading Option
A = Standard Cluster
B = Easier Cluster

Science Cluster Combination Random Number (S)
1 = Science Random Number 1
2 = Science Random Number 2
3 = Science Random Number 3
4 = Science Random Number 4
5 = UH Form
6 = Science Random Number 5
7 = Science Random Number 6

Student International Grade (Derived)
7 = Grade 7
8 = Grade 8
9 = Grade 9
10 = Grade 10
11 = Grade 11
12 = Grade 12
13 = Grade 13
96 = Ungraded
97 = Not Applicable
98 = Invalid
99 = Missing

Student (Standardized) Birth - Month
1 = January
2 = February
3 = March
4 = April
5 = May
6 = June
7 = July
8 = August
9 = September
10 = October
11 = November
12 = December
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Student (Standardized) Birth -Year
9995 = Valid Skip
9996 = Not Reached
9997 = Not Applicable
9998 = Invalid
9999 = No Response

Student (Standardized) Gender
1 = Female
2 = Male
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

What is the <highest level of schooling> completed by your mother?
1 = <ISCED level 3A>
2 = <ISCED level 3B, 3C>
3 = <ISCED level 2>
4 = <ISCED level 1>
5 = She did not complete <ISCED level 1>
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Does your mother have this qualification? <ISCED level 6>
1 = Yes
2 = No
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

What is the <highest level of schooling> completed by your father?
1 = <ISCED level 3A>
2 = <ISCED level 3B, 3C>
3 = <ISCED level 2>
4 = <ISCED level 1>
5 = He did not complete <ISCED level 1>
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

In your home: <Country-specific wealth item 1>
0040001 = Austria : a laptop \ notebook \ a Tablet PC - Yes
0040002 = Austria : a laptop \ notebook \ a Tablet PC - No
0056001 = Belgium : A home cinema system (LCD or LED screen with home cinema system) - Yes
0056002 = Belgium : A home cinema system (LCD or LED screen with home cinema system) - No
0100001 = Bulgaria : Smartphone (Smartphone) - Yes
0100002 = Bulgaria : Smartphone (Smartphone) - No
0152001 = Chile : A second home (holiday or weekend) - Yes
0152002 = Chile : A second home (holiday or weekend) - No
0158001 = Chinese Taipei : Piano or violin or other more expensive instruments - Yes
0158002 = Chinese Taipei : Piano or violin or other more expensive instruments - No
0188001 = Costa Rica : Cable TV service (Sky, Cable Tica, Amnet, etc.) - Yes
0188002 = Costa Rica : Cable TV service (Sky, Cable Tica, Amnet, etc.) - No
0208001 = Denmark : musical instrument (fx klaver, guitar, violin) - Yes
0208002 = Denmark : musical instrument (fx klaver, guitar, violin) - No
0276001 = Germany : A game console (z. B. Playstation®, Nintendo®, X-Box®, Wii®) - Yes
0276002 = Germany : A game console (z. B. Playstation®, Nintendo®, X-Box®, Wii®) - No
0344001 = Hong Kong-China : Plasma TV \ LCD TV (40 inches or more) - Yes
0344002 = Hong Kong-China : Plasma TV \ LCD TV (40 inches or more) - No
0348001 = Hungary : Video game console for example. Sony PlayStationTM - Yes
0348002 = Hungary : Video game console for example. Sony PlayStationTM - No
0372001 = Ireland : Your own MP3 player (e.g. iPod®) - Yes
0372002 = Ireland : Your own MP3 player (e.g. iPod®) - No
0410001 = Republic of Korea : air conditioner - Yes
0410002 = Republic of Korea : air conditioner - No
0442001 = Luxembourg : A smartphone with unlimited internet access - Yes
0442002 = Luxembourg : A smartphone with unlimited internet access - No
0528001 = Netherlands : An alarm system on the house - Yes
0528002 = Netherlands : An alarm system on the house - No
0604001 = Peru : Video games (Playstation, Nintendo, Wii, etc.). - Yes
0604002 = Peru : Video games (Playstation, Nintendo, Wii, etc.). - No
0620001 = Portugal : Cable TV or satellite dish - Yes
0620002 = Portugal : Cable TV or satellite dish - No
0756001 = Switzerland : A musical instrument (without recorder) - Yes
0756002 = Switzerland : A musical instrument (without recorder) - No
0764002 = Thailand : air conditioneer - Do not have
0780001 = Trinidad & Tobago : Flat Screen TV, Smart TV - Yes
0780002 = Trinidad & Tobago : Flat Screen TV, Smart TV - No
0784001 = United Arab Emirates : A laptop of your own - Yes
0784002 = United Arab Emirates : A laptop of your own - No
0792001 = Turkey : Air-conditioning-type heating and cooling system - Yes
0792002 = Turkey : Air-conditioning-type heating and cooling system - No
0826101 = United Kingdom : A premium TV package (e.g. Sky movies, Sky sports) - Yes
0826102 = United Kingdom : A premium TV package (e.g. Sky movies, Sky sports) - No
0826201 = United Kingdom (Scotland) : A premium TV package (e.g. Sky Movies, Sky Sports) - Yes
0826202 = United Kingdom (Scotland) : A premium TV package (e.g. Sky Movies, Sky Sports) - No
0840001 = United States of America : A guest room - Yes
0840002 = United States of America : A guest room - No

In your home: <Country-specific wealth item 2>
0008001 = Albania : Free cultural television programs - Yes
0008002 = Albania : Free cultural television programs - No
0036001 = Australia : A home gym and\or gym membership - Yes
0036002 = Australia : A home gym and\or gym membership - No
0040001 = Austria : a game console (Playstation, Nintendo, X-Box, Wii) - Yes
0040002 = Austria : a game console (Playstation, Nintendo, X-Box, Wii) - No
0124001 = Canada : A subscription to a daily newspaper - Yes
0124002 = Canada : A subscription to a daily newspaper - No
0158001 = Chinese Taipei : iPod (related Walkman products) - Yes
0158002 = Chinese Taipei : iPod (related Walkman products) - No
0191001 = Croatia : Game console (eg. Playstation 3 or Nintendo Wii) - Yes
0191002 = Croatia : Game console (eg. Playstation 3 or Nintendo Wii) - No
0214001 = Dominican Republic : Air conditioner - Yes
0214002 = Dominican Republic : Air conditioner - No
0250001 = France : A digital camera (apart from that of a mobile phone). - Yes
0250002 = France : A digital camera (apart from that of a mobile phone). - No
0348001 = Hungary : Tablet (eg. IPad, Samsung Galaxy Tab, BlackBerry) - Yes
0348002 = Hungary : Tablet (eg. IPad, Samsung Galaxy Tab, BlackBerry) - No
0372001 = Ireland : Your own laptop or tablet computer (e.g. iPad®, BlackBerry®, PlayBook™) - Yes
0372002 = Ireland : Your own laptop or tablet computer (e.g. iPad®, BlackBerry®, PlayBook™) - No
0411001 = Kosovo : Free cultural television programs - Yes
0411002 = Kosovo : Free cultural television programs - No
0422001 = Lebanon : Flat screen TV \ plasma \ LCD - Yes
0422002 = Lebanon : Flat screen TV \ plasma \ LCD - No
0554001 = New Zealand : Boat (e.g. leisure craft, yacht) - Yes
0554002 = New Zealand : Boat (e.g. leisure craft, yacht) - No
0702001 = Singapore : Domestic helper (e.g. full\part-time maid) - Yes
0702002 = Singapore : Domestic helper (e.g. full\part-time maid) - No
0705001 = Slovenia : Attendance at extracurricular activities funded by your parents. - Yes
0705002 = Slovenia : Attendance at extracurricular activities funded by your parents. - No
0784001 = United Arab Emirates : Electronic games (Wii, Xbox) - Yes
0784002 = United Arab Emirates : Electronic games (Wii, Xbox) - No
0807001 = FYR Macedonia : Interactive whiteboard - Yes
0807002 = FYR Macedonia : Interactive whiteboard - No
0826101 = United Kingdom : A high definition (HD) TV - Yes
0826102 = United Kingdom : A high definition (HD) TV - No
0826201 = United Kingdom (Scotland) : A musical instrument (e.g. piano, violin) - Yes
0826202 = United Kingdom (Scotland) : A musical instrument (e.g. piano, violin) - No
0840001 = United States of America : A high-speed Internet connection - Yes
0840002 = United States of America : A high-speed Internet connection - No
0858001 = Uruguay : Refrigerator with freezer - Yes
0858002 = Uruguay : Refrigerator with freezer - No
0970001 = China : Digital camera or digital video camera - Yes
0970002 = China : Digital camera or digital video camera - No

In your home: <Country-specific wealth item 3>
0040001 = Austria : a swimming pool or a swimming pond - Yes
0040002 = Austria : a swimming pool or a swimming pond - No
0056001 = Belgium : Domestic help (cleaning services, gardening, etc.) - Yes
0056002 = Belgium : Domestic help (cleaning services, gardening, etc.) - No
0188001 = Costa Rica : A home theater system - Yes
0214001 = Dominican Republic : Decoration articles - Yes
0214002 = Dominican Republic : Decoration articles - No
0348001 = Hungary : Digital Camera (non-integrated phone) - Yes
0348002 = Hungary : Digital Camera (non-integrated phone) - No
0372001 = Ireland : Your own smartphone (e.g. iPhone®, Samsung® or Sony® android phone) - Yes
0372002 = Ireland : Your own smartphone (e.g. iPhone®, Samsung® or Sony® android phone) - No
0380001 = Italy : an air conditioning system - Yes
0410001 = Republic of Korea : dish wash machine - Yes
0410002 = Republic of Korea : dish wash machine - No
0422001 = Lebanon : Cable TV \ paid \ satellite - Yes
0422002 = Lebanon : Cable TV \ paid \ satellite - No
0442001 = Luxembourg : A recent games console (p. Ex. 4® Playstation, Wii U®) - Yes
0442002 = Luxembourg : A recent games console (p. Ex. 4® Playstation, Wii U®) - No
0528001 = Netherlands : Energy regulator (eg E-thermostat or Eneco Show) - Yes
0528002 = Netherlands : Energy regulator (eg E-thermostat or Eneco Show) - No
0643001 = Russian Federation : House or cottage, built in the last 15 years - Yes
0643002 = Russian Federation : House or cottage, built in the last 15 years - No
0705001 = Slovenia : Travel abroad for a week or more. - Yes
0705002 = Slovenia : Travel abroad for a week or more. - No
0756001 = Switzerland : A digital video camera - Yes
0756002 = Switzerland : A digital video camera - No
0780001 = Trinidad & Tobago : Refrigerator with ice marker - Yes
0780002 = Trinidad & Tobago : Refrigerator with ice marker - No
0788001 = Tunisia : Machine for washing clothes - Yes
0788002 = Tunisia : Machine for washing clothes - No
0826101 = United Kingdom : A tablet computer (e.g. iPad) - Yes
0826102 = United Kingdom : A tablet computer (e.g. iPad) - No
0826201 = United Kingdom (Scotland) : Do your parents pay for a cleaner to clean your home - Yes
0826202 = United Kingdom (Scotland) : Do your parents pay for a cleaner to clean your home - No
0840001 = United States of America : A musical instrument - Yes
0840002 = United States of America : A musical instrument - No
0858001 = Uruguay : Notebook PC or laptop (not including Ceibal) - Yes
0858002 = Uruguay : Notebook PC or laptop (not including Ceibal) - No

How many in your home: Televisions
1 = None
2 = One
3 = Two
4 = Three or more
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How many books are there in your home?
1 = 0-10 books
2 = 11-25 books
3 = 26-100 books
4 = 101-200 books
5 = 201-500 books
6 = More than 500 books
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

<this academic year>: My parents are interested in my school activities.
1 = Strongly disagree
2 = Disagree
3 = Agree
4 = Strongly agree
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Country of Birth International - Self
1 = Country of test
2 = Other country
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

How old were you when you arrived in <country of test>?
1 = age 0 - 1
2 = age 1
3 = age 2
4 = age 3
5 = age 4
6 = age 5
7 = age 6
8 = age 7
9 = age 8
10 = age 9
11 = age 10
12 = age 11
13 = age 12
14 = age 13
15 = age 14
16 = age 15
17 = age 16
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

International Language at Home
1 = Language of test
2 = Other language
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Did you attend <ISCED 0>?
1 = No
2 = Yes, for one year or less
3 = Yes, for more than one year
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How old were you when you started <ISCED 0>? Years
1 = 1 year or younger
2 = 2 years
3 = 3 years
4 = 4 years
5 = 5 years
6 = 6 years or older
7 = I did not attend <ISCED 0>
8 = I do not remember
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

How old were you when you started <ISCED 1>? Years
1 = 3 or younger
2 = 4
3 = 5
4 = 6
5 = 7
6 = 8
7 = 9 or older
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Have you ever repeated a <grade>? At <ISCED 1>
1 = No, never
2 = Yes, once
3 = Yes, twice or more
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Which of the following do you expect to complete?
1 = <ISCED level 2>
2 = <ISCED level 3B or C>
3 = <ISCED level 3A>
4 = <ISCED level 4>
5 = <ISCED level 5B>
6 = <ISCED level 5A or 6>
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

I feel like an outsider (or left out of things) at school.
1 = Strongly agree
2 = Agree
3 = Disagree
4 = Strongly disagree
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Teachers called on me less often than they called on other students.
1 = Never or almost never
2 = A few times a year
3 = A few times a month
4 = Once a week or more
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Number of <class periods> required per week in <test language>
995 = Valid Skip
996 = Not Reached
997 = Not Applicable
998 = Invalid
999 = No Response

In a normal, full week at school, how many <class periods> are you required to attend in total?
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

In the last two full weeks of school, how often: I <skipped> a whole school day
1 = None
2 = One or two times
3 = Three or four times
4 = Five or more times
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

On avg, how many days do you attend physical education classes each week?
1 = 0 days
2 = 1 day
3 = 2 days
4 = 3 days
5 = 4 days
6 = 5 days
7 = 6 days
8 = 7 days
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Which <school science> course did you attend? Physics: This year
0 = Not checked
1 = Checked
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

<school science> courses? I can choose the <school science> course(s) I study.
1 = No, not at all
2 = Yes, to a certain degree
3 = Yes, I can choose freely
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How often does this happen in your <school science> lessons? Students don't listen to what the teacher says.
1 = Every lesson
2 = Most lessons
3 = Some lessons
4 = Never or hardly ever
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

When learning <school science>? Students are given opportunities to explain their ideas.
1 = In all lessons
2 = In most lessons
3 = In some lessons
4 = Never or hardly ever
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How often does this happen in <school science>? The teacher explains scientific ideas.
1 = Never or almost never
2 = Some lessons
3 = Many lessons
4 = Every lesson or almost every lesson
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How informed are you about this environmental issue? The increase of greenhouse gases in the atmosphere
1 = I have never heard of this
2 = I have heard about this but I would not be able to explain what it is really about
3 = I know something about this and could explain the general issue
4 = I am familiar with this and I would be able to explain this well
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

This issue will improve or get worse over next 20 years? Air pollution (student)
1 = Improve
2 = Stay about the same
3 = Get worse
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

To what extent are you interested in: Biosphere (e.g. ecosystem services, sustainability)
1 = Not interested
2 = Hardly interested
3 = Interested
4 = Highly interested
5 = I don't know what this is
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Making an effort in my <school science> subject(s) is worth it because this will help me in the work I want to do lat
1 = Strongly Agree
2 = Agree
3 = Disagree
4 = Strongly Disagree
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Recognise the science question that underlies a newspaper report on a health issue.
1 = I could do this easily
2 = I could do this with a bit of effort
3 = I would struggle to do this on my own
4 = I couldn't do this
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How often do you do these things? Watch TV programmes about <broad science>
1 = Very often
2 = Regularly
3 = Sometimes
4 = Never or hardly ever
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Student coded science class (from ST065Q01NA)
1 = Physics
2 = Chemistry
3 = Biology
4 = Earth and space
5 = Applied sciences and technology
6 = General, integrated, or comprehensive science
7 = Could not determine
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Available for you to use at home: Desktop computer
1 = Yes, and I use it
2 = Yes, but I don't use it
3 = No
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How old were you when you first used a digital device?
1 = 6 years old or younger
2 = 7-9 years old
3 = 10-12 years old
4 = 13 years old or older
5 = I have never used a digital device until today
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

How old were you when you first used a computer?
1 = 6 years old or younger
2 = 7-9 years old
3 = 10-12 years old
4 = 13 years old or older
5 = I have never used a computer
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

How old were you when you first accessed the Internet?
1 = 6 years old or younger
2 = 7-9 years old
3 = 10-12 years old
4 = 13 years old or older
5 = I have never accessed the Internet
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

During a typical weekday, for how long do you use the Internet at school?
1 = No time
2 = 1-30 minutes per day
3 = 31-60 minutes per day
4 = Between 1 hour and 2 hours per day
5 = Between 2 hours and 4 hours per day
6 = Between 4 hours and 6 hours per day
7 = More than 6 hours per day
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Use digital devices outside school for playing one-player games.
1 = Never or hardly ever
2 = Once or twice a month
3 = Once or twice a week
4 = Almost every day
5 = Every day
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Compare your <school science> lessons at school\your add sci inst. My teacher does a lot to help
1 = More likely in my regular school lessons
2 = No difference
3 = More likely in my additional instruction
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How many years altogether have you attended additional instruction? Years
0 = 0
1 = 1
2 = 2
3 = 3
4 = 4
5 = 5
6 = 6
7 = 7
8 = 8
9 = 9
10 = 10
11 = 11
12 = 12
13 = 13
14 = 14
15 = 15
16 = 16
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Did you change schools when you were attending <ISCED 1>?
1 = No, I attended all of <ISCED 1> at the same school.
2 = Yes, I changed schools once.
3 = Yes, I changed schools twice or more.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Did you change schools when you were attending <ISCED 2>?
1 = No, I attended all of <ISCED 2> at the same school.
2 = Yes, I changed schools once.
3 = Yes, I changed schools twice or more.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Have you ever changed your <study programme>?
1 = No
2 = Yes, I changed the <study programme> once.
3 = Yes, I changed the <study programme> twice or more.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Watched TV programmes about science
1 = Very Often
2 = Regularly
3 = Sometimes
4 = Never
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Discuss how well my child is doing at school.
1 = Never or hardly ever
2 = Once or twice a year
3 = Once or twice a month
4 = Once or twice a week
5 = Every day or almost every day
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Which of the following statements best describes the schooling available to students in your location?
1 = There are two or more other schools in this area that compete with the school my child is currently attending.
2 = There is one other school in this area that competes with the school my child is currently attending.
3 = There are no other schools in this area that compete with the school my child is currently attending.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

The school is at a short distance to home.
1 = Not important
2 = Somewhat important
3 = Important
4 = Very important
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

<the last academic year>, particip.\ school-related activity? Discussed child's behaviour with a teacher on my own in
1 = Yes
2 = No
3 = Not supported by school
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How many parents of your childs friends at this school do you know?
1 = 0
2 = 1-2
3 = 3-5
4 = 6 or more
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

What was the most important reason why your child attended a <supervision and care arrangement>?
1 = Attendance was mandatory.
2 = We\I could not care for the child (e. g. work, illness).
3 = We\I wanted additional learning stimulation for the child (e. g., social, academic).
4 = Most other children attended a < supervision and care arrangement>.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

What was the most important reason why your child attended an <early childhood educational development arrangement>?
1 = Attendance was mandatory.
2 = We\I could not care for the child (e. g. work, illness).
3 = We\I wanted additional learning stimulation for the child (e. g., social, academic).
4 = Most other children attended an <early childhood educational development arrangement>.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

What type of provider offered this <pre-primary education arrangement>?
1 = Public management and mainly public funding (e.g. <national example>)
2 = Private management and mainly public funding (e.g. <national example>)
3 = Private management and mainly private funding (e.g. <national example>)
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

How many hours per week did your child attend a <pre-primary education arrangement> at the age of three years?
1 = 0 hours per week
2 = up to 10 hours per week
3 = 11-20 hours per week
4 = 21-30 hours per week
5 = 31-40 hours per week
6 = 41-50 hours per week
7 = 51 hours per week or more
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

What was the most important reason why your child attended a <pre-primary education arrangement>?
1 = Attendance was mandatory.
2 = We\I could not care for the child (e.g. work, illness).
3 = We\I wanted additional learning stimulation for the child (e.g., social, academic).
4 = Most other children attended a <pre-primary education arrangement>.
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Environmental issues as a serious concern? Air pollution
1 = This is a serious concern for me personally as well as others
2 = This is a serious concern for other people in my country but not me personally
3 = This is a serious concern only for people in other countries
4 = This is not a serious concern for anyone
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

In the last twelve months, about how much would you have paid to educational providers for services?
1 = Nothing
2 = <More than $0 but less than $W>
3 = <$W or more but less than $X>
4 = <$X or more but less than $Y>
5 = <$Y or more but less than $Z>
6 = <$Z> or more
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

What is your annual household income?
1 = Less than < $A >
2 = < $A > or more but less than < $B >
3 = < $B > or more but less than < $C >
4 = < $C > or more but less than < $D>
5 = < $D > or more but less than < $E>
6 = < $E > or more
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Unique national study programme code
00080001 = Albania: Lower and Upper secondary education
00080002 = Albania: Secondary education, vocational variant
00080004 = Albania: Secondary education for adults(upper)
00120003 = Algeria: Certificate of specialized vocational training
00320002 = Argentina: General Programme - Lower Secondary ( 1st, 2nd and 3rd year)
00320003 = Argentina: General Programme - Upper Secondary ( 4th, 5th and 6th year)
00320004 = Argentina: Vocational Programme - Lower Secondary ( 1st, 2nd and 3rd year)
00320005 = Argentina: Vocational programme - Upper Secondary ( 4th, 5th, 6th and 7th year)
00320006 = Argentina: General Programme - Lower Secondary ( 1st and 2nd year)
00320007 = Argentina: General Programme - Upper Secondary ( 3th, 4th and 5th year)
00320008 = Argentina: Vocational Programme - Lower Secondary ( 1st and 2nd year)
00320009 = Argentina: Vocational programme - Upper Secondary ( 3th, 4th , 5th and 6th year)
00360001 = Australia: Lower secondary general academic
00360002 = Australia: Lower secondary with some VET subjects
00360003 = Australia: Upper secondary general academic
00360004 = Australia: Upper secondary with some VET subjects
00400003 = Austria: Vocational school for apprentices
00400004 = Austria: Intermediate technical and vocational school
00400005 = Austria: Higher technical and vocational college
00560001 = Belgium: (First year A of first stage of) secondary Education
00560002 = Belgium: (First year B of first stage of secondary Education) – Remedial\Prevocational, Classified as General
00560003 = Belgium: Second year of first stage - preparing for vocational upper secundary education, Classified as General
00560004 = Belgium: Second year of first stage - Preparing for all streams in mainstream upper secondary education
00560005 = Belgium: Second & third stage general secondary education
00560006 = Belgium: Second & third stage technical secondary education
00560007 = Belgium: Second & third stage artistic secondary education
00560008 = Belgium: Second & third stage vocational secondary education
00560009 = Belgium: Part-time vocational secondary education focused on the labour market
00560010 = Belgium: Special secondary education - lower secondary (training form 3 \ first 3 years)
00560011 = Belgium: Special secondary education - upper secondary (training form 3 \ years 4 and 5)
00560012 = Belgium: 1st or 2d year of general education (=First degree of general education (Fr\Ger))
00560013 = Belgium: 1st or 2nd year of remedial ed (1st degree of remedial reeducation(Fr) 1st or 2nd year B special needs (Ger)
00560014 = Belgium: 1st or 2d Complementary year to 1st degree (Fr only)
00560015 = Belgium: 3d, 4th, 5th year of general education (=Second & third degrees of general education (Fr\Ger))
00560016 = Belgium: 3rd, 4th, 5th year of tech or artistical ed (tran) (2nd & 3rd degrees of tech or artistical ed) (Fr\Ger)
00560017 = Belgium: 3rd, 4th, 5th year of tech or artistical ed (qual) (2nd & 3rd degrees of tech or artistical ed) (Fr\Ger)
00560018 = Belgium: 3d, 4th, 5th year of vocational education (= Second & third degrees of vocational education) (Fr\Ger)
00560019 = Belgium: Vocational training focused on the labour market (Fr Com only)
00560020 = Belgium: Special secondary education (training form 3) (Fr Com only)
00560021 = Belgium: First, second & third degrees of Special secondary education ( form 4) (Fr Com only)
00560022 = Belgium: Special secondary education (lower secondary) (Germ Com only)
00560023 = Belgium: Special secondary education (upper secondary) (Germ Com only)
00560024 = Belgium: Part-time Vocational Education (Germ Com only)
00560025 = Belgium: Vocational Education (Germ Com only)
00760003 = Brazil: Upper secondary education- 3 years long
00760004 = Brazil: Upper secondary education- 4 years long
01000002 = Bulgaria: Secondary education - general non-profiled (upper)
01000003 = Bulgaria: Secondary education - general profiled (upper)
01000004 = Bulgaria: Secondary education - vocational (upper)
01240001 = Canada: Grades 7 - 9 (Quebec: Secondary 1 – 3 )
01240002 = Canada: Grades 10 - 12 (Quebec: Secondary 4 and 5, Newfoundland and Labrador: Level I - III)
01520003 = Chile: Second cycle of upper secondary education, academic orientation
01520004 = Chile: Second cycle of upper secondary education, technical orientation
01580003 = Chinese Taipei: Vocational senior high school
01580004 = Chinese Taipei: Five-year college (not including the last two years)
01700002 = Colombia: Secondary education (upper), academica
01700003 = Colombia: Secondary education (upper), tecnica
01880002 = Costa Rica: Secondary education (upper) academic
01880003 = Costa Rica: Secondary education (upper) technical
01910002 = Croatia: Four year vocational programmes
01910004 = Croatia: Vocational programmes for industry
01910005 = Croatia: Vocational programmes for crafts
01910006 = Croatia: Lower qualification vocational programmes
01910007 = Croatia: Primary school - lower secondary education
01960001 = Cyprus: General Secondary Education -Gymnasium - Lower
01960002 = Cyprus: General Secondary Education -Gymnasium - Upper
01960003 = Cyprus: General Secondary Education - Lyceum
02030002 = Czech Republic: 6, 8-year gymnasium and 8-year conservatory (lower secondary)
02030003 = Czech Republic: 6, 8-year gymnasium (upper secondary)
02030005 = Czech Republic: Voc\tech secondary school with maturate
02030006 = Czech Republic: Conservatory (upper secondary)
02030007 = Czech Republic: Voc\tech secondary school without maturate
02030009 = Czech Republic: Secondary special schools - practical schools, vocational education predominantly
02080001 = Denmark: Primary and lower secondary (public school, private school)
02080003 = Denmark: Education at a production school
02080004 = Denmark: Upper secondary education (general, commercial, technical)
02140001 = Dominican Republic: Second cycle of the Primary Education
02140002 = Dominican Republic: First and second cycle of Secondary Education
02140003 = Dominican Republic: Specialized secondary education - ISCED3 two year (11th and 12th grade) technical specialization
02140004 = Dominican Republic: Specialized secondary education - ISCED3 two year (11th and 12th grade) specialization in arts
02140005 = Dominican Republic: Basic Adult Education
02140006 = Dominican Republic: Secondary Adult Education
02330003 = Estonia: Vocational upper secondary education
02460002 = Finland: Comprehensive secondary school, additional education
02460004 = Finland: Upper secodary vocational school
02460005 = Finland: Double or triple examination, upper secondary school
02760001 = Germany: Lower secondary, some with access to upper secondary (special education)
02760002 = Germany: Lower secondary, some with access to upper secondary; basic gen educ (exclusively students of the same track
02760003 = Germany: Lower secondary, access to upper secondary; extensive gen educ (exclusively students of the same track)
02760004 = Germany: Lower secondary, access to upper secondary; academic education (exclusively students of the same track)
02760005 = Germany: Upper secondary (exclusively students of the same track [cf. key 4])
02760006 = Germany: Lower secondary comprehensive, achievement-based access to upper secondary (within school streaming)
02760007 = Germany: Upper secondary comprehensive (taught together with students of other tracks at lower secondary [cf. key 6])
02760008 = Germany: Lower secondary comprehensive, no access to upper; basic general education (different tracks taught separate
02760009 = Germany: Lower secondary comprehensive, access to upper; extensive gen educ (different tracks taught separately)
02760010 = Germany: Lower secondary comprehensive, access to upper secondary; academic educ (different tracks taught separately)
02760011 = Germany: Upper secondary comprehensive (after lower secondary with different tracks taught separately [cf. key 10])
02760012 = Germany: Lower secondary, expectedly no access to upper; basic gen educ (students of different tracks taught together
02760013 = Germany: Lower secondary, expectedly access to upper; extensive gen educ (students of different tracks taught togethe
02760014 = Germany: Lower secondary, no access to upper; basic general education (students of different tracks taught separately
02760015 = Germany: Lower secondary, access to upper; extensive general education (students of different tracks taught separatel
02760016 = Germany: Lower secondary with access to upper (Waldorf school)
02760017 = Germany: Upper secondary (Waldorf school [cf. key 16])
02760018 = Germany: Pre-vocational training year upper secondary level
02760019 = Germany: Vocational school upper secondary level
03000003 = Greece: Technical-Vocational Schools Upper secondary education
03440001 = Hong Kong-China: Lower Secondary in G & I Sch.
03440002 = Hong Kong-China: Upper Secondary in G & I Sch.
03480002 = Hungary: Grammar school 1 (4-5 years long)
03480003 = Hungary: Grammar school 2 (6 years long, ISCED2)
03480004 = Hungary: Grammar school 2 (6 years long, ISCED3)
03480005 = Hungary: Grammar school 3 (8 years long, ISCED2)
03480006 = Hungary: Grammar school 3 (8 years long, ISCED3)
03520002 = Iceland: Stúdentspróf. Matriculation examination certificate (granting access to university studies)
03760001 = Israel: Primary + Lower secondary education, grades 1-8
03760002 = Israel: Primary + Lower secondary education, grades 1-9
03760003 = Israel: Lower secondary education, grades 7-9
03760004 = Israel: Upper secondary education, grades 10-12
03760005 = Israel: 4 years Higher education, grades 9-12
03760006 = Israel: 6 years Higher education, grades 7-12 (ISCED2)
03760007 = Israel: 6 years Higher education, grades 7-12 (ISCED3)
03800001 = Italy: Artistic, Classical, Linguistic, Music & Performing Arts, Scientific (& appl sci), Social Studies (& socio-eco
03800003 = Italy: Vocational Institute, Art Institute (Industry and Craft Workers)
03800005 = Italy: Vocational training; Vocational Schools of Bolzano and Trento Provinces
03920002 = Japan: College of Technology (First 3 years)
03920003 = Japan: Upper secondary school (Vocational)
03920004 = Japan: Secondary school (Upper division)
03980001 = Kazakhstan: Programm of basic secondary education (5-9 grades);
03980002 = Kazakhstan: Programm of general secondary education (10-11 grades of general secondary schools, gymnasiums, lyceums,e
03980003 = Kazakhstan: Programme of technical and vocational education (specialized school, colledge)
04100003 = Korea: Upper Secondary Vocational Education
04220002 = Lebanon: Secondary Professional education( lower), B.P.1=8 and B.P.2=9)
04220004 = Lebanon: Secondary Technical Education (upper), BT1= 10 and BT2=11 and BT3=12
04220005 = Lebanon: Secondary Professional education( upper), LP1=10, LP2=11, LP3=12
04400002 = Lithuania: Secondary School (Lower Secondary)
04400003 = Lithuania: Secondary School (Upper Secondary)
04420001 = Luxembourg: Preparatory courses within modular classes of the Preparatory Regime
04420002 = Luxembourg: Lower technical secondary education
04420003 = Luxembourg: Lower general secondary education
04420004 = Luxembourg: A 3-year vocational education
04420005 = Luxembourg: A 4-year technical education
04420006 = Luxembourg: A 4 to 5-year technical, commercial or social education
04420007 = Luxembourg: Upper general secondary education
04420008 = Luxembourg: Lower secondary education, international and foreign schools
04420009 = Luxembourg: Upper secondary education, international and foreign schools
04460001 = Macao-China: Grammar or International Program at Lower Secondary Levels
04460002 = Macao-China: Grammar or International Program at Higher Secondary Levels
04460003 = Macao-China: Technical or Prevocational Program at Higher Secondary Levels
04700002 = Malta: Secondary education (upper, comprehensive program)
04700003 = Malta: Secondary education (upper, passed year 6 exam)
04700004 = Malta: Secondary education (upper, did not pass year 6 exam)
04700005 = Malta: General Upper-secondary, post-compulsory level
04700006 = Malta: General post-secondary level (A-level, non-tertiary courses)
04700007 = Malta: Vocational Upper-secondary, post-compulsory level (ISCED2)
04700008 = Malta: Vocational Upper-secondary, post-compulsory level (ISCED3)
04700009 = Malta: Vocational, post-secondary level (MATSEC Cert.)
04840003 = Mexico: General Lower Secondary by Television
04840004 = Mexico: General Baccalaureate or Upper Secondary: Correspond to annual plan
04840005 = Mexico: General Baccalaureate or Upper Secondary: Correspond to semester plan
04840006 = Mexico: General Baccalaureate or Upper Secondary: Correspond to 2 years plan
04840007 = Mexico: Technical Baccalaureate or Technical from Upper Secondary
04980001 = Moldova: Gymnasium - Secondary Education (lower)
04980002 = Moldova: Lyceum - Secondary Education (upper)
04980003 = Moldova: Professional school - Secondary Education (upper), 3-year study program
04980004 = Moldova: College - Post-Secondary Non-Tertiary Education, 4-year study program
04990001 = Montenegro: general upper secondary school
04990002 = Montenegro: lower secondary or second stage of compulsory basic education
04990003 = Montenegro: 3-year vocational secondary school
04990004 = Montenegro: 4-year vocational secondary school
05280001 = Netherlands: practical preparation for labour market
05280002 = Netherlands: general vocational oriented; in next year tracks into BB, KB, GL, TL
05280003 = Netherlands: admission to ISCED3 = MBO level 1-3, post secondary, non tertiary
05280004 = Netherlands: admission to ISCED3 = MBO level 1-3
05280005 = Netherlands: admission to ISCED3 = MBO tertiary level,
05280006 = Netherlands: Lower secondary grades of HAVO, preparing for upper secondary HAVO or MBO (vocational post-secondary ed)
05280007 = Netherlands: Lower secondary grades of VWO, preparing for upper secondary VWO
05280008 = Netherlands: Upper secondary grades of HAVO, preparing for HBO (higher vocational education\college)
05280009 = Netherlands: Upper secondary grades of VWO, preparing for university
06040001 = Peru: Lower secondary education.Includes regular, alternately and distance program.
06040002 = Peru: Upper secondary education.Includes regular, alternately and distance program.
06040003 = Peru: Alternative Basic Education-Advanced cycle. Includes Adults secondary program.
06040004 = Peru: Technical Productive Education-Middle cycle
06200001 = Portugal: Basic Schooling - Regular Curriculum - 3rd cycle
06200002 = Portugal: Basic Schooling - Specialized Arts Curriculum - 3rd cycle
06200003 = Portugal: Basic Schooling - Education and pre-professional, 3rd cycle
06200004 = Portugal: Basic Schooling - pre-vocational, 3rd cycle
06200005 = Portugal: Secondary Education - Scientific-Humanistic studies
06200006 = Portugal: Secondary Education - Professional
06200007 = Portugal: Secondary Education - Specialized Arts Curriculum
06200008 = Portugal: Secondary Education - Educational and Professional
06200009 = Portugal: Secondary Education - Vocational
06420001 = Romania: General education, leading to the continuation of studies
06420002 = Romania: Lower Secondary education, it continues the Gimnasium to the first part of the High School
06430001 = Russian Federation: Programme of basic general education (Lower secondary)
06430002 = Russian Federation: Programme of secondary general education (Upper secondary)
06430003 = Russian Federation: Programme of secondary professional education (technikum, colledge, vocational school, etc.)
07030002 = Slovak Republic: Vocational Basic school
07030003 = Slovak Republic: Secondary school (ISCED2)
07030004 = Slovak Republic: Secondary school (ISCED3)
07030006 = Slovak Republic: Secondary College - branch\class with a school leaving examination
07030007 = Slovak Republic: Secondary College - branch\class without a school leaving examination
07050001 = Slovenia: Secondary general education - general and cassical gymnasiums
07050002 = Slovenia: Secondary general education - technical gymnasiums
07050004 = Slovenia: Vocational education programmes of medium duration - school type and dual type\apprenticeship organisation
07050005 = Slovenia: Vocational education programmes of short duration
07240002 = Spain: Initial Vocational Qualification Program\Basic Vocational Training
07240004 = Spain: Intermediate Level Vocational Training
07520002 = Sweden: Upper secondary school, general orientation
07520003 = Sweden: Upper secondary school, vocational orientation
07520004 = Sweden: Upper secondary school, introduction programmes
07560001 = Switzerland: Secondary education, First stage
07560002 = Switzerland: Preparatory course for vocational education
07560003 = Switzerland: School preparing for the university entrance certificate
07560004 = Switzerland: Vocational baccalaureat, dual system 3-4 years
07560005 = Switzerland: Vocational education, dual system 3-4 years
07560007 = Switzerland: Basic vocational education (2 years)
07640003 = Thailand: Vocational Certificate level (Cert. of VOC.)
07800001 = Trinidad and Tobago: Secondary education (lower)
07800002 = Trinidad and Tobago: Secondary education (upper)
07800003 = Trinidad and Tobago: Secondary education (pre-vocational)
07800004 = Trinidad and Tobago: Secondary education (technical\vocational)
07840001 = United Arab Emirates: Secondary education (lower)
07840002 = United Arab Emirates: Secondary Education ( upper)
07840003 = United Arab Emirates: Secondary education (technical )
07880001 = Tunisia: Enseignement preparatoire (lower secondary)
07880002 = Tunisia: Enseignement secondaire (upper secondary)
07920003 = Turkey: Vocational and Technical Secondary Education
08070001 = Macedonia: Primary Education - eight years
08070002 = Macedonia: Primary Education - nine years
08070003 = Macedonia: Secondary Education - Gymnasium\General
08070004 = Macedonia: Secondary Education - Vocational
08070005 = Macedonia: Secondary Education - Artistic
08070006 = Macedonia: Secondary education - Technical - two years
08070007 = Macedonia: Secondary education - Technical - three years
08070008 = Macedonia: Secondary education - Technical - five years
08270001 = United Kingdom (excl.Scotland): Students studying mostly toward GCSE or equivalent level 1 or level 2 qualifications
08270002 = United Kingdom (excl.Scotland): Students studying mostly towards a level 1 Diploma
08270003 = United Kingdom (excl.Scotland): Students studying mostly towards a level 2 Diploma
08270004 = United Kingdom (excl.Scotland): Students studying mostly towards a level 3 Diploma
08270005 = United Kingdom (excl.Scotland): Students studying mostly for AS or A Levels or equivalent non-vocational level 3 qual
08270006 = United Kingdom (excl.Scotland): Students studying mostly towards level 1 or 2 vocational qualifications
08270007 = United Kingdom (excl.Scotland): Students studying mostly for level 3 vocational qualifications
08270008 = United Kingdom (excl.Scotland): Students studying mostly toward Entry Level Certificates
08270009 = United Kingdom (excl.Scotland): Students below Year 10 - England
08270010 = United Kingdom (excl.Scotland): Students below Year 10 - Wales
08270011 = United Kingdom (excl.Scotland): Students below Year 11 - Northern Ireland
08280001 = Scotland: Senior Phase and studying mainly towards qualifications at SCQF level 1-5
08280002 = Scotland: Senior Phase and studying mainly towards qualifications at SCQF level 6 or 7
08280003 = Scotland: Senior Phase and studying mainly towards National Progression Award or National Certificate at SCQF level 1
08280004 = Scotland: Senior Phase and studying mainly towards National Progression Award or National Certificate at SCQF level 6
08280005 = Scotland: Broad general education and studying directly for some qualifications at SCQF level 1-5
08280006 = Scotland: Broad general education\not studying directly for any of these qualifications yet (secondary school)
08280007 = Scotland: Broad general education\not studying directly for any of these qualifications yet (primary school)
08580002 = Uruguay: Lower Secondary with a technological component
08580003 = Uruguay: Lower Secondary with a very important technological component
08580005 = Uruguay: Lower secondary in Rural Primary Schools
08580007 = Uruguay: Technical upper secondary (technological or artistic baccalaureate))
08580008 = Uruguay: Vocational upper secondary (with continuity)
08580009 = Uruguay: Vocational Upper Secondary (1 year last)
08580010 = Uruguay: Technical upper secondary (university)
09700001 = People’s Republic of China: Secondary education (lower)
09700002 = People’s Republic of China: Secondary education (upper)
09700003 = People’s Republic of China: Vocational Junior Secondary Schools
09700004 = People’s Republic of China: Secondary Vocational Schools, 5-years vocational schools

ISCED level
1 = ISCED level 1
2 = ISCED level 2
3 = ISCED level 3
4 = ISCED level 4
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

ISCED designation
1 = A
2 = B
3 = C
4 = M
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

ISCED orientation
1 = General
2 = Pre-Vocational
3 = Vocational
4 = Modular
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Students’ expected occupational status (SEI)
9999995 = Valid Skip
9999996 = Not Reached
9999997 = Not Applicable
9999998 = Invalid
9999999 = No Response

Index Immigration status
1 = Native
2 = Second-Generation
3 = First-Generation
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Mother’s Education (ISCED)
0 = None
1 = ISCED 1
2 = ISCED 2
3 = ISCED 3B, C
4 = ISCED 3A, ISCED 4
5 = ISCED 5B
6 = ISCED 5A, 6
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Grade Repetition
0 = Did not repeat a <grade>
1 = Repeated a <grade>
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Duration in early childhood education and care
0 = Attended ECEC for less than a year
1 = Attended ECEC for at least one but less than two years
2 = Attended ECEC for at least two but less than three years
3 = Attended ECEC for at least three but less than four years
4 = Attended ECEC for at least four but less than five years
5 = Attended ECEC for at least five but less than six years
6 = Attended ECEC for at least six but less than seven years
7 = Attended ECEC for at least seven but less than eight years
8 = Attended ECEC for at least eight years
95 = Valid Skip
96 = Not Reached
97 = Not Applicable
98 = Invalid
99 = No Response

Learning time (minutes per week) - <Mathematics>
99999995 = Valid Skip
99999996 = Not Reached
99999997 = Not Applicable
99999998 = Invalid
99999999 = No Response

Number of school changes
0 = no change
1 = one change
2 = two or more changes
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Number of changes in educational biography (Sum)
5 = Valid Skip
6 = Not Reached
7 = Not Applicable
8 = Invalid
9 = No Response

Country of Birth National Categories- Father
015602 = Another province in mainland China (QCH)
015603 = Hong Kong, Macau, Taiwan (Chinese Taipei)
015604 = Province or municipality in which test is being taken (China)
100201 = African country with Portuguese as the official language
100202 = A Sub-Saharan country (Africa excl. Maghreb)
115002 = Another country within the European Union (ITA)
115005 = A European country that is not a member of the European Union
115009 = Another country within the European Union (MLT)
115106 = An Eastern European country outside the EU
178401 = Another State of the Gulf Cooperation Council (ARE)

Language at home (3-digit code)
602 = Minority languages Bulgarian dialects (BGR)
622 = Serbian of a yekavian variant or Montenegrin
627 = Other National dialects or languages (ROU)
639 = Other former Yugoslavian languages (SVN)

ISCO-08 Occupation code - Mother
1100 = Chief executives, senior officials and legislators
1114 = Senior officials of special-interest organizations
1210 = Business services and administration managers
1219 = Business services and administration managers not elsewhere classified
1220 = Sales, marketing and development managers
1222 = Advertising and public relations managers
1300 = Production and specialised services managers
1310 = Production managers in agriculture, forestry and fisheries
1311 = Agricultural and forestry production managers
1312 = Aquaculture and fisheries production managers
1320 = Manufacturing, mining, construction, and distribution managers
1324 = Supply, distribution and related managers
1330 = Information and communications technology service managers
1346 = Financial and insurance services branch managers
1349 = Professional services managers not elsewhere classified
1400 = Hospitality, retail and other services managers
1431 = Sports, recreation and cultural centre managers
1439 = Services managers not elsewhere classified
2110 = Physical and earth science professionals
2131 = Biologists, botanists, zoologists and related professionals
2132 = Farming, forestry and fisheries advisers
2146 = Mining engineers, metallurgists and related professionals
2149 = Engineering professionals not elsewhere classified
2160 = Architects, planners, surveyors and designers
2230 = Traditional and complementary medicine professionals
2263 = Environmental and occupational health and hygiene professionals
2269 = Health professionals not elsewhere classified
2310 = University and higher education teachers
2340 = Primary school and early childhood teachers
2359 = Teaching professionals not elsewhere classified
2424 = Training and staff development professionals
2430 = Sales, marketing and public relations professionals
2433 = Technical and medical sales professionals (excluding ICT)
2434 = Information and communications technology sales professionals
2500 = Information and communications technology professionals
2510 = Software and applications developers and analysts
2519 = Software and applications developers and analysts not elsewhere classified
2529 = Database and network professionals not elsewhere classified
2600 = Legal, social and cultural professionals
2619 = Legal professionals not elsewhere classified
2622 = Librarians and related information professionals
2632 = Sociologists, anthropologists and related professionals
2633 = Philosophers, historians and political scientists
2635 = Social work and counselling professionals
2643 = Translators, interpreters and other linguists
2654 = Film, stage and related directors and producers
2656 = Announcers on radio, television and other media
2659 = Creative and performing artists not elsewhere classified
3100 = Science and engineering associate professionals
3110 = Physical and engineering science technicians
3111 = Chemical and physical science technicians
3119 = Physical and engineering science technicians not elsewhere classified
3120 = Mining, manufacturing and construction supervisors
3132 = Incinerator and water treatment plant operators
3134 = Petroleum and natural gas refining plant operators
3139 = Process control technicians not elsewhere classified
3140 = Life science technicians and related associate professionals
3141 = Life science technicians (excluding medical)
3150 = Ship and aircraft controllers and technicians
3153 = Aircraft pilots and related associate professionals
3155 = Air traffic safety electronics technicians
3211 = Medical imaging and therapeutic equipment technicians
3212 = Medical and pathology Labouratory technicians
3214 = Medical and dental prosthetic technicians
3220 = Nursing and midwifery associate professionals
3230 = Traditional and complementary medicine associate professionals
3252 = Medical records and health information technicians
3257 = Environmental and occupational health inspectors and associates
3259 = Health associate professionals not elsewhere classified
3300 = Business and administration associate professionals
3310 = Financial and mathematical associate professionals
3311 = Securities and finance dealers and brokers
3314 = Statistical, mathematical and related associate professionals
3334 = Real estate agents and property managers
3339 = Business services agents not elsewhere classified
3359 = Regulatory government associate professionals not elsewhere classified
3400 = Legal, social, cultural and related associate professionals
3410 = Legal, social and religious associate professionals
3422 = Sports coaches, instructors and officials
3423 = Fitness and recreation instructors and program leaders
3430 = Artistic, cultural and culinary associate professionals
3435 = Other artistic and cultural associate professionals
3510 = Information and communications technology operations and user support technicians
3511 = Information and communications technology operations technicians
3512 = Information and communications technology user support technicians
3513 = Computer network and systems technicians
4210 = Tellers, money collectors and related clerks
4212 = Bookmakers, croupiers and related gaming workers
4229 = Client information workers not elsewhere classified
4312 = Statistical, finance and insurance clerks
4413 = Coding, proof-reading and related clerks
4419 = Clerical support workers not elsewhere classified
5110 = Travel attendants, conductors and guides
5140 = Hairdressers, beauticians and related workers
5151 = Cleaning and housekeeping supervisors in offices, hotels and other establishments
5161 = Astrologers, fortune-tellers and related workers
5169 = Personal services workers not elsewhere classified
5320 = Personal care workers in health services
5329 = Personal care workers in health services not elsewhere classified
5419 = Protective services workers not elsewhere classified
6000 = Skilled agricultural, forestry and fishery workers
6113 = Gardeners, horticultural and nursery growers
6129 = Animal producers not elsewhere classified
6200 = Market-oriented skilled forestry, fishery and hunting workers
6222 = Inland and coastal waters fishery workers
6300 = Subsistence farmers, fishers, hunters and gatherers
6330 = Subsistence mixed crop and livestock farmers
6340 = Subsistence fishers, hunters, trappers and gatherers
7100 = Building and related trades workers, excluding electricians
7110 = Building frame and related trades workers
7113 = Stonemasons, stone cutters, splitters and carvers
7114 = Concrete placers, concrete finishers and related workers
7119 = Building frame and related trades workers not elsewhere classified
7120 = Building finishers and related trades workers
7127 = Air conditioning and refrigeration mechanics
7130 = Painters, building structure cleaners and related trades workers
7200 = Metal, machinery and related trades workers
7210 = Sheet and structural metal workers, moulders and welders, and related workers
7220 = Blacksmiths, toolmakers and related trades workers
7221 = Blacksmiths, hammersmiths and forging press workers
7223 = Metal working machine tool setters and operators
7224 = Metal polishers, wheel grinders and tool sharpeners
7233 = Agricultural and industrial machinery mechanics and repairers
7315 = Glass makers, cutters, grinders and finishers
7316 = Sign writers, decorative painters, engravers and etchers
7317 = Handicraft workers in wood, basketry and related materials
7318 = Handicraft workers in textile, leather and related materials
7319 = Handicraft workers not elsewhere classified
7400 = Electrical and electronic trades workers
7410 = Electrical equipment installers and repairers
7413 = Electrical line installers and repairers
7420 = Electronics and telecommunications installers and repairers
7422 = Information and communications technology installers and servicers
7500 = Food processing, wood working, garment and other craft and related trades workers
7510 = Food processing and related trades workers
7511 = Butchers, fishmongers and related food preparers
7512 = Bakers, pastry-cooks and confectionery makers
7516 = Tobacco preparers and tobacco products makers
7520 = Wood treaters, cabinet-makers and related trades workers
7523 = Woodworking-machine tool setters and operators
7531 = Tailors, dressmakers, furriers and hatters
7532 = Garment and related pattern-makers and cutters
7543 = Product graders and testers (excluding foods and beverages)
7544 = Fumigators and other pest and weed controllers
7549 = Craft and related workers not elsewhere classified
8000 = Plant and machine operators, and assemblers
8110 = Mining and mineral processing plant operators
8112 = Mineral and stone processing plant operators
8113 = Well drillers and borers and related workers
8114 = Cement, stone and other mineral products machine operators
8120 = Metal processing and finishing plant operators
8122 = Metal finishing, plating and coating machine operators
8130 = Chemical and photographic products plant and machine operators
8131 = Chemical products plant and machine operators
8140 = Rubber, plastic and paper products machine operators
8150 = Textile, fur and leather products machine operators
8151 = Fibre preparing, spinning and winding machine operators
8154 = Bleaching, dyeing and fabric cleaning machine operators
8155 = Fur and leather preparing machine operators
8156 = Shoemaking and related machine operators
8159 = Textile, fur and leather products machine operators not elsewhere classified
8160 = Food and related products machine operators
8170 = Wood processing and papermaking plant operators
8180 = Other stationary plant and machine operators
8183 = Packing, bottling and labelling machine operators
8189 = Stationary plant and machine operators not elsewhere classified
8212 = Electrical and electronic equipment assemblers
8310 = Locomotive engine drivers and related workers
8312 = Railway brake, signal and switch operators
8341 = Mobile farm and forestry plant operators
8343 = Crane, hoist and related plant operators
9110 = Domestic, hotel and office cleaners and helpers
9112 = Cleaners and helpers in offices, hotels and other establishments
9120 = Vehicle, window, laundry and other hand cleaning workers
9200 = Agricultural, forestry and fishery labourers
9210 = Agricultural, forestry and fishery labourers
9300 = Labourers in mining, construction, manufacturing and transport
9329 = Manufacturing labourers not elsewhere classified
9332 = Drivers of animal-drawn vehicles and machinery
9500 = Street and related sales and service workers
9600 = Refuse workers and other elementary workers
9621 = Messengers, package deliverers and luggage porters
9623 = Meter readers and vending-machine collectors
9629 = Elementary workers not elsewhere classified
9703 = Social beneficiary (unemployed, retired, sickness, etc.)
9705 = Vague(a good job, a quiet job, a well paid job, an office job)

REP_BWGT: RANDOMLY ASSIGNED UNIT NUMBER
1 = final variance unit 1
2 = final variance unit 2
3 = final variance unit 3