| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.9%
|
| 2 | Every few weeks | 19 |
9.1%
|
| 3 | Every few months | 74 |
35.4%
|
| 4 | Not at all | 112 |
53.6%
|
| Sysmiss | 44 |