| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
0.8%
|
| 2 | Every few weeks | 56 |
14.1%
|
| 3 | Every few months | 192 |
48.5%
|
| 4 | Not at all | 145 |
36.6%
|
| Sysmiss | 27 |