| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.per day | 339 |
18.4%
|
| 2 | 2.per month | 52 |
2.8%
|
| 3 | 3.per semester | 5 |
0.3%
|
| 4 | 4.per academic year | 227 |
12.3%
|
| 5 | 5. per study period | 1217 |
66%
|
| 8 | 5 |
0.3%
|
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 1240 |