| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
3.2%
|
| 2 | Every few weeks | 17 |
7.8%
|
| 3 | Every few months | 27 |
12.3%
|
| 4 | Not at all | 168 |
76.7%
|
| Sysmiss | 41 |