| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.7%
|
| 2 | Every few weeks | 16 |
11.9%
|
| 3 | Every few months | 36 |
26.7%
|
| 4 | Not at all | 82 |
60.7%
|
| Sysmiss | 31 |