| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.6%
|
| 2 | Every few weeks | 18 |
14.5%
|
| 3 | Every few months | 37 |
29.8%
|
| 4 | Not at all | 19 |
15.3%
|
| Sysmiss | 48 |
38.7%
|