| Value | Category |
|---|---|
| 0 | No schooling |
| 1 | Sub A/sub B grade 1/grade 2/Std 1 |
| 2 | Std 2 |
| 3 | Std 3 |
| 4 | Std 4 |
| 5 | Std 5 |
| 6 | Std 6 |
| 7 | Std 7 |
| 8 | Std 8/NTC I |
| 9 | Std 9/NTC II |
| 10 | Std 10/NTC III |
| 11 | Diploma/certificate with Std 9 or lower |
| 12 | Diploma/certificate with Std 10 |
| 13 | Degree |
| 14 | Other |
| 15 | Unspecified |