| Value | Category |
|---|---|
| 1 | Vocational, without certificate |
| 2 | Vocational, with certificate |
| 3 | Professional or technical, without degree or diploma |
| 4 | Professional or technical, with degree or diploma |
| 5 | Apprenticeship |
| 6 | On the job training |
| 7 | None |
| 8 | Not reported |
| Sysmiss |