| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 35 |
8.8%
|
| 2 | Every few weeks | 137 |
34.3%
|
| 3 | Every few months | 153 |
38.3%
|
| 4 | Not at all | 74 |
18.5%
|
| Sysmiss | 24 |