| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.per day | 1 |
0.1%
|
| 2 | 2.per month | 13 |
1%
|
| 3 | 3.per semester | 23 |
1.7%
|
| 4 | 4.per academic year | 787 |
57.9%
|
| 5 | 5. per study period | 529 |
38.9%
|
| 8 | 6 |
0.4%
|
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 1726 |