| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 10 |
6.6%
|
| 2 | Every few weeks | 47 |
30.9%
|
| 3 | Every few months | 70 |
46.1%
|
| 4 | Not at all | 25 |
16.4%
|
| -99 | 12 | ||
| Sysmiss | 19 |