| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 21 |
7.7%
|
| 2 | Every few weeks | 50 |
18.4%
|
| 3 | Every few months | 81 |
29.8%
|
| 4 | Not at all | 120 |
44.1%
|
| Sysmiss | 35 |