| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 1930 |
52.4%
|
| 2 | 1-3 times a month | 1053 |
28.6%
|
| 3 | 1-2 times per term | 216 |
5.9%
|
| 4 | 1-2 times per year | 104 |
2.8%
|
| 5 | Never | 380 |
10.3%
|
| Sysmiss | 3281 |