| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
4.7%
|
| 2 | Every few weeks | 17 |
13.4%
|
| 3 | Every few months | 59 |
46.5%
|
| 4 | Not at all | 45 |
35.4%
|
| -99 | 3 | ||
| Sysmiss | 29 |