| Value | Category |
|---|---|
| 0 | no classes completed |
| 1 | class 1 completed |
| 2 | class 2 completed |
| 3 | class 3 completed |
| 4 | class 4 completed |
| 5 | class 5 completed |
| 6 | class 6 completed |
| 7 | class 7 completed |
| 8 | class 8 completed |
| 9 | class 9 completed |
| 10 | class 10 completed |
| 11 | class 11 completed |
| 12 | class 12 completed |
| 13 | lower secondary diploma |
| 14 | secondary school/ baccalaureate holder |
| 15 | technical/vocational pre-secondary diploma/certificate |
| 16 | technical/vocational post-secondary diploma/certificate |
| 17 | undergraduate |
| 18 | graduate |
| 19 | post-graduate and above |
| 20 | temple schooling |
| 97 | other |
| 98 | dk |