| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
1.1%
|
| 2 | Every few weeks | 5 |
5.5%
|
| 3 | Every few months | 29 |
31.9%
|
| 4 | Not at all | 56 |
61.5%
|
| Sysmiss | 20 |