| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
3.3%
|
| 2 | Every few weeks | 15 |
6.1%
|
| 3 | Every few months | 88 |
35.8%
|
| 4 | Not at all | 135 |
54.9%
|
| Sysmiss | 17 |