| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
1.1%
|
| 2 | Every few weeks | 2 |
2.1%
|
| 3 | Every few months | 30 |
31.9%
|
| 4 | Not at all | 61 |
64.9%
|
| Sysmiss | 28 |