| Value |
Category |
| 00 |
NIU (not in universe) |
| 10 |
Primary education |
| 20 |
Compulsory (lower) secondary school |
| 30 |
Upper secondary education |
| 31 |
Higher general secondary |
| 32 |
Higher technical and vocational secondary school |
| 33 |
Intermediate technical and vocational school |
| 34 |
Apprenticeship training |
| 40 |
Non-university education |
| 41 |
Technical or vocational course |
| 42 |
(Academic) Intermediate degrees |
| 50 |
University, college |
| 60 |
Doctorate |
| 99 |
Unknown |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.