| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. per day | 7 |
0.3%
|
| 2 | 2. per month | 9 |
0.4%
|
| 3 | 3. per semester | 29 |
1.4%
|
| 4 | 4. per academic year | 696 |
33.1%
|
| 5 | 5. per school period | 1361 |
64.7%
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 12129 |