| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.3%
|
| 2 | Every few weeks | 47 |
15%
|
| 3 | Every few months | 121 |
38.7%
|
| 4 | Not at all | 77 |
24.6%
|
| Sysmiss | 64 |
20.4%
|