| Value | Category | 
|---|---|
| -7 | Legal skip | 
| -3 | Interviewer error | 
| -1 | Don't know | 
| 1 | No formal education or kindergarten only | 
| 2 | Some primary school not completed | 
| 3 | Primary education completed | 
| 4 | Basic education | 
| 5 | Secondary education | 
| 6 | Vocational level 4 &5 (diploma) | 
| 7 | Bachelor degree | 
| 8 | Masters degree | 
| 9 | Doctorate |