| Value | Category | Cases | |
|---|---|---|---|
| 1 | primary | 57 |
48.3%
|
| 2 | lower secondary | 40 |
33.9%
|
| 3 | upper secondary | 16 |
13.6%
|
| 4 | higher | 5 |
4.2%
|
| Sysmiss | 12 |