Stratum ID (Bundesland, Foerderschule, Berufsschule) (FDZ)
1 = DEU - stratum 01: NOR\Baden-Wuerttemberg (BW)
2 = DEU - stratum 02: NOR\Bayern (BY)
3 = DEU - stratum 03: NOR\Berlin (BE)
4 = DEU - stratum 04: NOR\Brandenburg (BB)
5 = DEU - stratum 05: NOR\Bremen (HB)
6 = DEU - stratum 06: NOR\Hamburg (HH)
7 = DEU - stratum 07: NOR\Hessen (HE)
8 = DEU - stratum 08: NOR\Mecklenburg-Vorpommern (MV)
9 = DEU - stratum 09: NOR\Niedersachsen (NI)
10 = DEU - stratum 10: NOR\Nordrhein-Westfalen (NW)
11 = DEU - stratum 11: NOR\Rheinland-Pfalz (RP)
12 = DEU - stratum 12: NOR\Saarland (SL)
13 = DEU - stratum 13: NOR\Sachsen (SN)
14 = DEU - stratum 14: NOR\Sachsen-Anhalt (ST)
15 = DEU - stratum 15: NOR\Schleswig-Holstein (SH)
16 = DEU - stratum 16: NOR\Thueringen (TH)
17 = DEU - stratum 17: SEN schools
18 = DEU - stratum 18: Vocational Schools

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

Mode of Respondent
1 = Paper
2 = Computer

ICT Literacy Questionnaire Option
0 = No
1 = Yes

Total Time: STIntro1
99999995 = Valid Skip
99999996 = Not Reached
99999997 = Not Applicable
99999998 = Invalid
99999999 = No Response

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