| Value | Category |
|---|---|
| 0 | < 1 year completed |
| 1 | Grade one |
| 2 | Grade two |
| 3 | Grade three |
| 4 | Grade four |
| 5 | Grade five |
| 6 | Grade six |
| 7 | Grade seven |
| 8 | Grade eight |
| 9 | Grade nine |
| 10 | Grade ten |
| 11 | Grade 11 and above |
| 94 | School based pre-primary centers |
| 95 | Informal pre-school |
| 98 | DK |