| Value | Category |
|---|---|
| -9 | DK |
| 1 | No formal Education or Less than Complete Lower Primary |
| 2 | Lower primary complete |
| 3 | High Primary |
| 4 | Secondary (vocational, gymnasium, religious secondary) |
| 5 | Post-Secondary specialist/Professional College |
| 6 | Bachelor, Master Degree |
| 7 | Doctorate Degree |
| Sysmiss |