| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
5.2%
|
| 2 | Every few weeks | 25 |
16.2%
|
| 3 | Every few months | 83 |
53.9%
|
| 4 | Not at all | 38 |
24.7%
|
| -99 | 10 | ||
| Sysmiss | 19 |