| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 11436 |
37.2%
|
| 2 | Primary | 5730 |
18.6%
|
| 3 | Secondary + | 13604 |
44.2%
|
| 9 | Missing/dk | 6 |
0%
|
| Sysmiss | 2921 |