| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 15 |
6.3%
|
| 2 | Every few weeks | 27 |
11.3%
|
| 3 | Every few months | 83 |
34.9%
|
| 4 | Not at all | 113 |
47.5%
|
| Sysmiss | 51 |