| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
1.6%
|
| 2 | Every few weeks | 15 |
7.9%
|
| 3 | Every few months | 50 |
26.2%
|
| 4 | Not at all | 123 |
64.4%
|
| Sysmiss | 47 |