| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.5%
|
| 2 | Every few weeks | 9 |
4.5%
|
| 3 | Every few months | 51 |
25.8%
|
| 4 | Not at all | 133 |
67.2%
|
| Sysmiss | 12 |