| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.4%
|
| 2 | Every few weeks | 33 |
11.4%
|
| 3 | Every few months | 152 |
52.4%
|
| 4 | Not at all | 101 |
34.8%
|
| Sysmiss | 78 |