| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.1%
|
| 2 | Every few weeks | 14 |
7.2%
|
| 3 | Every few months | 72 |
37.1%
|
| 4 | Not at all | 104 |
53.6%
|
| Sysmiss | 33 |