| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 11 |
4.8%
|
| 2 | Every few weeks | 39 |
17%
|
| 3 | Every few months | 129 |
56.3%
|
| 4 | Not at all | 50 |
21.8%
|
| -99 | 4 | ||
| Sysmiss | 27 |