| Value | Category |
|---|---|
| 0 | Studying Year 1 |
| 1 | Passed Year 1 |
| 2 | Passed Year 2 |
| 3 | Passed Year 3 |
| 4 | Passed Year 4 |
| 5 | Passed Year 5 |
| 6 | Passed Year 6 |
| 7 | Passed Year 7 |
| 8 | Passed Year 8 |
| 9 | Passed Year 9 |
| 10 | Passed Year 10 |
| 11 | Passed G.C.E.(O/L) |
| 12 | Passed Year 12 |
| 13 | Passed G.C.E. (A/L) |
| 14 | Passed GAQ/GSQ |
| 15 | Degree |
| 16 | Post Graduate/Diploma |
| 17 | |
| 19 | No Schooling |
| Sysmiss |