| Value | Category | Cases | |
|---|---|---|---|
| 1 | primary | 5570 |
64.8%
|
| 2 | secondary lower | 2783 |
32.4%
|
| 3 | higher | 92 |
1.1%
|
| 8 | dk | 145 |
1.7%
|
| Sysmiss | 6761 |