| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
4.3%
|
| 2 | Every few weeks | 10 |
10.6%
|
| 3 | Every few months | 29 |
30.9%
|
| 4 | Not at all | 51 |
54.3%
|
| Sysmiss | 13 |