| Value | Category | Cases | |
|---|---|---|---|
| 1 | Primary or none | 452 |
2.2%
|
| 2 | Secondary | 2523 |
12.3%
|
| 3 | Higher | 1311 |
6.4%
|
| 5 | No information | 455 |
2.2%
|
| Sysmiss | 15776 |
76.9%
|