| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
4.2%
|
| 2 | Every few weeks | 18 |
18.9%
|
| 3 | Every few months | 50 |
52.6%
|
| 4 | Not at all | 23 |
24.2%
|
| Sysmiss | 27 |