| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
5.1%
|
| 2 | Every few weeks | 13 |
16.5%
|
| 3 | Every few months | 18 |
22.8%
|
| 4 | Not at all | 44 |
55.7%
|
| Sysmiss | 30 |