| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 97 |
2.7%
|
| 1 | Once per month | 33 |
0.9%
|
| 2 | Once per week | 134 |
3.7%
|
| 3 | Twice per week | 206 |
5.7%
|
| 4 | More than twice per week | 3166 |
87.1%
|
| Sysmiss | 3747 |