| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
5.1%
|
| 2 | Every few weeks | 22 |
16.2%
|
| 3 | Every few months | 76 |
55.9%
|
| 4 | Not at all | 31 |
22.8%
|
| Sysmiss | 26 |