| Value | Category |
|---|---|
| 0 | |
| 1 | No education |
| 2 | Incomplete elementary school |
| 3 | Elementary school |
| 4 | One/two-year vocational school |
| 5 | Secondary - three years for skilled worker |
| 6 | Secondary-four years for highly skilled worker |
| 7 | Gymnasium |
| 8 | College |
| 9 | University (faculty) |
| 10 | Master's degree - specialization |
| 11 | Doctorate |