| Value | Category |
|---|---|
| 1 | Preprimary |
| 11 | Std I |
| 12 | Std II |
| 13 | Std III |
| 14 | Std IV |
| 15 | Std V |
| 16 | Std VI not pass |
| 17 | Std VI passed |
| 21 | Form I |
| 22 | Form II |
| 23 | Form III |
| 24 | Form IV |
| 25 | Form V not pass |
| 26 | Form V passed |
| 27 | Form VI notpass |
| 28 | Form VI passed |
| 29 | |
| 30 | |
| 31 | |
| 99 | Special educ |
| Sysmiss |