| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 15 |
9.8%
|
| 2 | Every few weeks | 34 |
22.2%
|
| 3 | Every few months | 47 |
30.7%
|
| 4 | Not at all | 57 |
37.3%
|
| -99 | 11 | ||
| Sysmiss | 19 |