| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.9%
|
| 2 | Every few weeks | 8 |
7.8%
|
| 3 | Every few months | 52 |
50.5%
|
| 4 | Not at all | 41 |
39.8%
|
| Sysmiss | 26 |