| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or once or more per week | 1911 |
19.8%
|
| 2 | Once or twice per month | 837 |
8.7%
|
| 3 | Rearly | 1959 |
20.3%
|
| 4 | Never | 4823 |
49.9%
|
| 9 | 142 |
1.5%
|
|
| Sysmiss | 2337 |