| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 13 |
6.3%
|
| 2 | Every few weeks | 29 |
14.1%
|
| 3 | Every few months | 95 |
46.1%
|
| 4 | Not at all | 69 |
33.5%
|
| -99 | 14 | ||
| Sysmiss | 34 |