| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.4%
|
| 2 | Every few weeks | 32 |
15.2%
|
| 3 | Every few months | 111 |
52.6%
|
| 4 | Not at all | 63 |
29.9%
|
| Sysmiss | 42 |