| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.7%
|
| 2 | Every few weeks | 23 |
15.5%
|
| 3 | Every few months | 52 |
35.1%
|
| 4 | Not at all | 69 |
46.6%
|
| Sysmiss | 32 |