| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 47 |
1.6%
|
| 2 | Primary | 610 |
20.4%
|
| 3 | Secondary | 1402 |
46.9%
|
| 4 | Higher | 784 |
26.2%
|
| Sysmiss | 145 |
4.9%
|