| Value | Category | Cases | |
|---|---|---|---|
| 10 | primary | 2898 |
38.6%
|
| 20 | secondary | 3895 |
51.9%
|
| 30 | higher | 306 |
4.1%
|
| 99 | missing | 4 |
0.1%
|
| Sysmiss | 396 |
5.3%
|