| Value | Category |
|---|---|
| 1 | Literacy program |
| 2 | Pre-primary (1-3) |
| 3 | Primary (1-9) |
| 4 | Secondary (1-3) |
| 5 | Upper secondary (1-4) |
| 6 | Higher technical education (1-3) |
| 7 | Non-university higher education (1-4) |
| 8 | University (1-8) |
| 9 | Postgraduate (1-5) |
| 10 | Other |
| 98 | Don't Know/Not Known |
| 99 | Refused/No response |