| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2 |
1.5%
|
| 1 | Once per month | 0 |
0%
|
| 2 | Once per week | 2 |
1.5%
|
| 3 | Twice per week | 8 |
6.2%
|
| 4 | More than twice per week | 118 |
90.8%
|
| Sysmiss | 248 |