| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
3.3%
|
| 2 | Every few weeks | 30 |
10.9%
|
| 3 | Every few months | 85 |
31%
|
| 4 | Not at all | 150 |
54.7%
|
| Sysmiss | 29 |