| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
4.9%
|
| 2 | Every few weeks | 15 |
18.5%
|
| 3 | Every few months | 36 |
44.4%
|
| 4 | Not at all | 26 |
32.1%
|
| Sysmiss | 28 |