| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.6%
|
| 2 | Every few weeks | 23 |
8.6%
|
| 3 | Every few months | 45 |
16.9%
|
| 4 | Not at all | 191 |
71.8%
|
| Sysmiss | 37 |