| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
4.9%
|
| 2 | Every few weeks | 34 |
10.4%
|
| 3 | Every few months | 117 |
35.9%
|
| 4 | Not at all | 159 |
48.8%
|
| Sysmiss | 28 |