| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 15 |
4.7%
|
| 2 | Every few weeks | 38 |
12%
|
| 3 | Every few months | 145 |
45.9%
|
| 4 | Not at all | 118 |
37.3%
|
| Sysmiss | 38 |