| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
3.2%
|
| 2 | Every few weeks | 9 |
9.5%
|
| 3 | Every few months | 46 |
48.4%
|
| 4 | Not at all | 37 |
38.9%
|
| Sysmiss | 27 |