| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
3.4%
|
| 2 | Every few weeks | 41 |
15.5%
|
| 3 | Every few months | 54 |
20.4%
|
| 4 | Not at all | 161 |
60.8%
|
| Sysmiss | 77 |