| Value |
Category |
| 00 |
None |
| 10 |
Basic |
| 20 |
Without school-leaving exam |
| 21 |
Secondary, apprentice (without diploma) |
| 22 |
Secondary, professional (without diploma) |
| 30 |
With school-leaving exam |
| 31 |
Secondary, apprentice |
| 32 |
Secondary, professional |
| 33 |
Secondary, general |
| 34 |
Higher vocational |
| 40 |
University |
| 41 |
Bachelor |
| 42 |
Master, engineer, doctoral |
| 43 |
Ph.D. |
| 98 |
Unknown |
| 99 |
NIU (not in universe) |
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.