| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.8%
|
| 2 | Every few weeks | 8 |
6.5%
|
| 3 | Every few months | 46 |
37.1%
|
| 4 | Not at all | 20 |
16.1%
|
| Sysmiss | 49 |
39.5%
|