| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.per day | 2 |
0.1%
|
| 2 | 2.per month | 301 |
16.8%
|
| 3 | 3.per semester | 187 |
10.5%
|
| 4 | 4.per academic year | 765 |
42.8%
|
| 5 | 5. per study period | 524 |
29.3%
|
| 8 | 8 |
0.4%
|
|
| 9 | 9. Missing | 0 |
0%
|
| Sysmiss | 1298 |