| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.4%
|
| 2 | Every few weeks | 54 |
18.2%
|
| 3 | Every few months | 130 |
43.8%
|
| 4 | Not at all | 106 |
35.7%
|
| Sysmiss | 71 |