| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
5.3%
|
| 2 | Every few weeks | 6 |
7.9%
|
| 3 | Every few months | 20 |
26.3%
|
| 4 | Not at all | 46 |
60.5%
|
| Sysmiss | 33 |