| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.3%
|
| 2 | Every few weeks | 37 |
12.3%
|
| 3 | Every few months | 121 |
40.1%
|
| 4 | Not at all | 137 |
45.4%
|
| Sysmiss | 66 |