| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
4.2%
|
| 2 | Every few weeks | 19 |
26.4%
|
| 3 | Every few months | 30 |
41.7%
|
| 4 | Not at all | 20 |
27.8%
|
| Sysmiss | 12 |