| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
4.1%
|
| 2 | Every few weeks | 12 |
16.4%
|
| 3 | Every few months | 21 |
28.8%
|
| 4 | Not at all | 37 |
50.7%
|
| Sysmiss | 11 |