| Value | Category | Cases | |
|---|---|---|---|
| 1 | none | 1698 |
7.2%
|
| 2 | primary | 10343 |
43.6%
|
| 3 | secondary | 10610 |
44.7%
|
| 4 | higher | 1062 |
4.5%
|
| 9 | missing/dk | 3 |
0%
|