| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 20 |
8.1%
|
| 2 | Every few weeks | 61 |
24.7%
|
| 3 | Every few months | 117 |
47.4%
|
| 4 | Not at all | 49 |
19.8%
|
| Sysmiss | 16 |