| Value | Category |
|---|---|
| 0 | No class |
| 1 | Class 1 |
| 2 | Class 2 |
| 3 | Class 3 |
| 4 | Class 4 |
| 5 | Class 5 |
| 6 | Class 6 |
| 7 | Class 7 |
| 8 | Class 8 |
| 9 | Class 9 |
| 10 | Class 10 |
| 11 | Class 11 |
| 12 | Class 12 |
| 13 | Lower secondary |
| 14 | Secondary school/baccalaureate holder |
| 15 | Technical/vocational pre-secondary |
| 16 | Technical/vocational post-secondary |
| 17 | Undergraduate |
| 18 | Graduate |
| 19 | Post graduate and above |
| 20 | Other |