| Value | Category |
|---|---|
| -99 | Don't know |
| -98 | Refused to answer |
| -77 | Other (please specify) |
| 0 | Not enrolled in any school |
| 1 | Pre-school |
| 2 | Primary school |
| 3 | Secondary school |
| 4 | Tertiary education |
| 2147483622 | Don't know |
| 2147483623 | Refused to answer |
| 2147483647 | Not applicable |
| 11 | .Z |