| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 2524 |
71%
|
| 2 | 1-3 times a month | 704 |
19.8%
|
| 3 | 1-2 times per term | 118 |
3.3%
|
| 4 | 1-2 times per year | 42 |
1.2%
|
| 5 | Never | 167 |
4.7%
|
| Sysmiss | 3424 |