| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
2.8%
|
| 2 | Every few weeks | 43 |
13.5%
|
| 3 | Every few months | 153 |
48.1%
|
| 4 | Not at all | 113 |
35.5%
|
| Sysmiss | 75 |