| Value | Category |
|---|---|
| 0 | Nursery/Pre school |
| 1 | std1 |
| 2 | std2 |
| 3 | std3 |
| 4 | std4 |
| 5 | std5 |
| 6 | std6 |
| 7 | std7 |
| 8 | std8 |
| 9 | form1 |
| 10 | form2 |
| 11 | form3 |
| 12 | form4 |
| 13 | form5 |
| 14 | form6 |
| 15 | univ 1 |
| 16 | univ 2 |
| 17 | univ 3 |
| 18 | univ 4 |
| 19 | univ 5 & above |
| 20 | TC Yr 1 |
| 21 | TC Yr 2 |
| 22 | TC Yr 3 |
| 23 | TC Yr 4 |
| Sysmiss |