| Value | Category |
|---|---|
| 0 | None |
| 1 | Kindergarten |
| 2 | Primary |
| 3 | JSS/JHS |
| 4 | Middle |
| 5 | SSS/SHS |
| 6 | Secondary |
| 7 | Vocational/Technical/Commercial |
| 8 | Teacher training/Nursing |
| 9 | Post secondary diploma |
| 10 | Bachelor degree |
| 11 | Post graduate (Cert., Diploma, Masters, PHD, ect) |
| Sysmiss |