| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
6.3%
|
| 2 | Every few weeks | 11 |
17.2%
|
| 3 | Every few months | 28 |
43.8%
|
| 4 | Not at all | 21 |
32.8%
|
| Sysmiss | 22 |