| Value | Category |
|---|---|
| 2 | 2 = Kindergarten/preschool training |
| 3 | 3 = Elementary |
| 4 | 4 = Basic |
| 5 | 5 = College/vocational school after basic |
| 6 | 6 = Secondary |
| 7 | 7 = College/vocational school after secondary |
| 8 | 8 = Bachelor |
| 9 | 9 = Master |
| 10 | 10 = Candidate/Doctor of sciences |
| 11 | 11 = Other (specify) |
| Sysmiss |