| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 12 |
0.8%
|
| 1 | Once per month | 196 |
12.7%
|
| 2 | Once per week | 495 |
32.1%
|
| 3 | Twice per week | 206 |
13.3%
|
| 4 | More than twice per week | 635 |
41.1%
|
| Sysmiss | 5839 |