| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 10 |
2.4%
|
| 2 | Every few weeks | 37 |
9%
|
| 3 | Every few months | 100 |
24.2%
|
| 4 | Not at all | 266 |
64.4%
|
| Sysmiss | 62 |