| Value | Category |
|---|---|
| 1 | Bachelor (first level of higher education) |
| 2 | Doctorate (third level of higher education, scientific) |
| 3 | Master (second level of higher education) |
| 4 | No education |
| 5 | Secondary |
| 6 | Specialization (second level of higher education) |
| 7 | Technical or Vocational |