| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
5.3%
|
| 2 | Every few weeks | 16 |
10.6%
|
| 3 | Every few months | 51 |
33.8%
|
| 4 | Not at all | 76 |
50.3%
|
| Sysmiss | 29 |