| Value | Category |
|---|---|
| -1 | Missing |
| No formal schooling | |
| 1 | Informal schooling only |
| 2 | Some primary schooling |
| 3 | Primary school completed |
| 4 | Some secondary school / high school |
| 5 | Secondary school / high school completed |
| 6 | Post-secondary qualifications, other than university |
| 7 | Some university |
| 8 | University completed |
| 9 | Post-graduate |
| 98 | Refused |
| 99 | Don't know |