| Value | Category |
|---|---|
| 0 | Pre-school/kindergarden |
| 1 | Class 1 completed |
| 2 | Class 2 completed |
| 3 | Class 3 completed |
| 4 | Class 4completed |
| 5 | Class 5 completed |
| 6 | Class 6 completed |
| 7 | Class 7completed |
| 8 | Class 8 completed |
| 9 | Class 9 completed |
| 10 | Class 10 completed |
| 11 | Class 11completed |
| 12 | Class 12 completed, |
| 13 | Lower Secondary school certificate |
| 14 | Upper Secondary School certificate |
| 15 | Technical/vocational pre-secondary diploma/certificate |
| 16 | Technical/vocational post-secondary diploma/certificate |
| 17 | College/university undergraduate studies |
| 18 | Bachelor degree (B.A.m BSc, etc.) |
| 19 | Masters degree (M.A., MSc, etc) |
| 20 | Doctorate degree (PhD) |
| 88 | No class completed |
| 98 | Don't Know |