| Value | Category |
|---|---|
| 00 | NA |
| 21 | literate without formal schooling :through attending NFEC |
| 22 | literate without formal schooling :Through attending AEC |
| 23 | literate without formal schooling :Through other means |
| 30 | literate but below primary |
| 40 | primary |
| 50 | middle |
| 60 | Secondary |
| 70 | higher secOndary |
| 80 | Graduate and above |
| 99 | Invalid |