| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
3.1%
|
| 2 | Every few weeks | 11 |
5.7%
|
| 3 | Every few months | 39 |
20.2%
|
| 4 | Not at all | 137 |
71%
|
| Sysmiss | 34 |