| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.3%
|
| 2 | Every few weeks | 17 |
9.9%
|
| 3 | Every few months | 76 |
44.4%
|
| 4 | Not at all | 74 |
43.3%
|
| Sysmiss | 20 |