| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 21 |
4.3%
|
| 2 | Every few weeks | 76 |
15.6%
|
| 3 | Every few months | 189 |
38.8%
|
| 4 | Not at all | 201 |
41.3%
|
| Sysmiss | 18 |