| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 20 |
6.9%
|
| 2 | Every few weeks | 31 |
10.8%
|
| 3 | Every few months | 133 |
46.2%
|
| 4 | Not at all | 104 |
36.1%
|
| Sysmiss | 13 |