| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
2.1%
|
| 2 | Every few weeks | 11 |
11.7%
|
| 3 | Every few months | 37 |
39.4%
|
| 4 | Not at all | 44 |
46.8%
|
| Sysmiss | 15 |