| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 11 |
3.1%
|
| 2 | Every few weeks | 52 |
14.8%
|
| 3 | Every few months | 212 |
60.2%
|
| 4 | Not at all | 77 |
21.9%
|
| Sysmiss | 14 |