| Value | Category |
|---|---|
| -9 | break-off |
| -7 | Legal skip |
| -3 | interviewer error |
| -2 | Refuse to answer |
| -1 | Don't know |
| 1 | No formal education or below completed primary |
| 2 | Primary education |
| 3 | Basic education |
| 4 | General secondary education (diploma) |
| 5 | Secondary education- vocational (certificate) |
| 6 | Vocational level 4 &5 (diploma) |
| 7 | Bachelor degree |
| 8 | Masters degree |
| 9 | Doctorate |
| Sysmiss |