| 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 |