| Value | Category |
|---|---|
| 1 | No formal schooling/Less than primary school |
| 2 | Primary school completed (gr. 1-4) |
| 3 | Gymnasium (gr.5-9) completed |
| 4 | Lyceum/General Secondary School/Trade School completed |
| 5 | College completed |
| 6 | University completed |
| 7 | Post graduate degree |
| 88 | Refused |