| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
5.7%
|
| 2 | Every few weeks | 13 |
10.7%
|
| 3 | Every few months | 62 |
50.8%
|
| 4 | Not at all | 40 |
32.8%
|
| Sysmiss | 16 |