| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.1%
|
| 2 | Every few weeks | 33 |
9.8%
|
| 3 | Every few months | 129 |
38.3%
|
| 4 | Not at all | 168 |
49.9%
|
| Sysmiss | 103 |