| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 134 |
16.9%
|
| 2 | 1-3 times a month | 278 |
35.1%
|
| 3 | 1-2 times per term | 246 |
31%
|
| 4 | 1-2 times per year | 42 |
5.3%
|
| 5 | Never | 93 |
11.7%
|
| Sysmiss | 1157 |