| Value | Category |
|---|---|
| -9 | |
| -8 | |
| -7 | |
| 1 | PRE-PRIMARY/NURSERY |
| 2 | STD 1 |
| 3 | STD 2 |
| 4 | STD 3 |
| 5 | STD 4 |
| 6 | STD 5 |
| 7 | STD 6 |
| 8 | STD 7 |
| 9 | STD 8 |
| 10 | FORM 1 |
| 11 | FORM 2 |
| 12 | FORM 3 |
| 13 | FORM 4 |
| 14 | FORM 5 |
| 15 | FORM 6 |
| 16 | UNIV 1 |
| 17 | UNIV 2 |
| 18 | UNIV 3 |
| 19 | UNIV 4 |
| 20 | UNIV 5 AND ABOVE |
| 21 | COLLEGE CERTIFICATE/DIPLOMA |
| 22 | UNIVERSITY DEGREE |
| 23 | POST-GRADUATE DEGREE |
| 24 | none |
| 99 | OTHER (SPECIFY) |
| Sysmiss |