| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. per day | 39 |
12%
|
| 2 | 2. per month | 84 |
25.8%
|
| 3 | 3. per semester | 51 |
15.7%
|
| 4 | 4. per academic year | 127 |
39.1%
|
| 5 | 5. per school period | 24 |
7.4%
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 13906 |