| Value | Category |
|---|---|
| -9 | Don't know |
| -7 | Legal skip |
| -6 | Unfinished questionnaire |
| -3 | Interviewer error |
| 1 | No formal education or less than Primary |
| 2 | Primary education (3-4 years) |
| 3 | Basic general education |
| 4 | Secondary (general attestat/ professional/ secondary vocational) |
| 5 | Post secondary Specialized vocational / other non-tertiary |
| 6 | Bachelor degree |
| 7 | Masters degree (or Higher Education diploma) |
| 8 | Candidate of Science |
| 9 | Doctor of Science |