| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 17 |
3.6%
|
| 2 | Every few weeks | 33 |
6.9%
|
| 3 | Every few months | 185 |
38.9%
|
| 4 | Not at all | 240 |
50.5%
|
| Sysmiss | 3 |