| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
3.8%
|
| 2 | Every few weeks | 19 |
5.9%
|
| 3 | Every few months | 69 |
21.6%
|
| 4 | Not at all | 220 |
68.8%
|
| Sysmiss | 34 |