| Value | Category |
|---|---|
| -77 | Other, specify |
| 1 | Pre-primary |
| 2 | Primary |
| 3 | Post-primary, vocational |
| 4 | Secondary |
| 5 | College, middle-level |
| 6 | University undergraduate |
| 7 | University postgraduate |
| 8 | Madrassa/ Duksi |
| 9 | Not enrolled |
| 11 | .. |
| 2147483622 | Don't know |
| 2147483623 | Refused to answer |
| 2147483647 | Not applicable |