| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
7.6%
|
| 2 | Every few weeks | 43 |
20.4%
|
| 3 | Every few months | 110 |
52.1%
|
| 4 | Not at all | 42 |
19.9%
|
| Sysmiss | 42 |