| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.3%
|
| 2 | Every few weeks | 43 |
14.1%
|
| 3 | Every few months | 142 |
46.7%
|
| 4 | Not at all | 112 |
36.8%
|
| Sysmiss | 51 |