| Value | Category |
|---|---|
| 1 | No formal education |
| 2 | Less than primary (incomplete) school |
| 3 | Completed primary school |
| 4 | Incompleted secondary school (junior) |
| 5 | Completed secondary school |
| 6 | Higher education than secondary school |
| 7 | Adult education only |
| 8 | College/University or more |
| 88 | Don't know |