| Value | Category |
|---|---|
| -7 | legal skip |
| -3 | interviewer error |
| 1 | no formal education or less than primary |
| 2 | primary education |
| 3 | basic general education |
| 4 | secondary (general attestat/ professional/ secondary vocational) |
| 5 | post secondary specialized vocational |
| 6 | bachelor degree |
| 7 | masters degree (or higher education diploma) |
| 8 | candidate of science degree |
| 9 | doctor of science degree |
| 99 | don't know |