| Value | Category |
|---|---|
| 1 | None |
| 2 | Primary level (1-7 years) |
| 3 | ZJC level (at least 9 years of school) |
| 4 | O\ level (at least 11 years of school) |
| 5 | A\ level (at least 12 or 13 years of school) |
| 6 | Diploma/Certificate after primary |
| 7 | Diploma/Certificate after secondary |
| 8 | Graduate/ Post-Graduate |