| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. per day | 10 |
0.6%
|
| 2 | 2. per month | 5 |
0.3%
|
| 3 | 3. per semester | 24 |
1.5%
|
| 4 | 4. per academic year | 619 |
38.9%
|
| 5 | 5. per school period | 934 |
58.7%
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 12639 |