| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
2.2%
|
| 2 | Every few weeks | 28 |
7.9%
|
| 3 | Every few months | 86 |
24.2%
|
| 4 | Not at all | 234 |
65.7%
|
| Sysmiss | 65 |