| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
3.1%
|
| 2 | Every few weeks | 21 |
21.9%
|
| 3 | Every few months | 57 |
59.4%
|
| 4 | Not at all | 15 |
15.6%
|
| Sysmiss | 13 |