| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 246 |
3%
|
| 1 | Primary | 2059 |
24.7%
|
| 2 | Secondary or higher | 483 |
5.8%
|
| 5 | No information | 482 |
5.8%
|
| Sysmiss | 5059 |
60.7%
|