| Value | Category |
|---|---|
| 0 | nursery/kg/pre-school |
| 1 | class 01 |
| 2 | class 02 |
| 3 | class 03 |
| 4 | class 04 |
| 5 | class 05 |
| 6 | class 06 |
| 7 | class 07 |
| 8 | class 08 |
| 9 | class 09 |
| 10 | class 10 |
| 11 | slc |
| 12 | intermediate |
| 13 | bachelor |
| 14 | master |
| 15 | profesional degree |
| 98 | did not attend last year |
| Sysmiss |