| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 10 |
3.7%
|
| 2 | Every few weeks | 22 |
8.1%
|
| 3 | Every few months | 137 |
50.4%
|
| 4 | Not at all | 103 |
37.9%
|
| Sysmiss | 31 |