| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 19 |
8.7%
|
| 2 | Every few weeks | 58 |
26.6%
|
| 3 | Every few months | 111 |
50.9%
|
| 4 | Not at all | 30 |
13.8%
|
| Sysmiss | 51 |