| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
1.6%
|
| 2 | Every few weeks | 6 |
9.4%
|
| 3 | Every few months | 33 |
51.6%
|
| 4 | Not at all | 24 |
37.5%
|
| Sysmiss | 22 |