| Value | Category |
|---|---|
| 0 | Not literate |
| 1 | Literate without formal schooling |
| 2 | Literate but below primary |
| 3 | Primary |
| 4 | Middle |
| 5 | Secondary |
| 6 | Graduate and above in : agriculture |
| 7 | Graduate and above in : engineering/technology |
| 8 | Graduate and above in : medicine |
| 9 | Graduate and above in : other subjects |