| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
3.1%
|
| 2 | Every few weeks | 27 |
13.8%
|
| 3 | Every few months | 53 |
27.2%
|
| 4 | Not at all | 109 |
55.9%
|
| Sysmiss | 21 |