| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 13 |
2.7%
|
| 2 | Every few weeks | 36 |
7.6%
|
| 3 | Every few months | 240 |
50.6%
|
| 4 | Not at all | 185 |
39%
|
| Sysmiss | 4 |