| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 13 |
4.4%
|
| 2 | Every few weeks | 71 |
23.8%
|
| 3 | Every few months | 159 |
53.4%
|
| 4 | Not at all | 55 |
18.5%
|
| -99 | 6 | ||
| Sysmiss | 56 |