| Value | Category |
|---|---|
| 0 | No education |
| 1 | Pre-school/ primary, not completed |
| 2 | Completed primary, but less than completed lower secondary |
| 3 | Completed lower secondary but less than completed upper secondary |
| 4 | Completed upper secondary |
| 5 | Post-secondary technical |
| 6 | University and higher |
| 7 | Formal adult education/litracy program |
| 9 | Other |
| Sysmiss |