| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 19 |
6.1%
|
| 2 | Every few weeks | 28 |
8.9%
|
| 3 | Every few months | 51 |
16.2%
|
| 4 | Not at all | 216 |
68.8%
|
| Sysmiss | 54 |