| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.3%
|
| 2 | Every few weeks | 16 |
5.1%
|
| 3 | Every few months | 83 |
26.3%
|
| 4 | Not at all | 212 |
67.3%
|
| Sysmiss | 78 |