| Value | Category | Cases | |
|---|---|---|---|
| 1 | primary | 17871 |
56.8%
|
| 2 | lower secondary | 8602 |
27.3%
|
| 3 | upper secondary | 3215 |
10.2%
|
| 4 | higher | 1192 |
3.8%
|
| 8 | don't know | 562 |
1.8%
|
| 9 | 15 |
0%
|
|
| 11 | .Z | 6054 |