| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
1.5%
|
| 2 | Every few weeks | 64 |
16.4%
|
| 3 | Every few months | 195 |
50%
|
| 4 | Not at all | 125 |
32.1%
|
| Sysmiss | 33 |