| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.per day | 43 |
72.9%
|
| 2 | 2.per month | 14 |
23.7%
|
| 3 | 3.per semester | 0 |
0%
|
| 4 | 4.per academic year | 1 |
1.7%
|
| 5 | 5. per study period | 0 |
0%
|
| 8 | 1 |
1.7%
|
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 3026 |