| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
1.3%
|
| 2 | Every few weeks | 22 |
9.7%
|
| 3 | Every few months | 106 |
46.9%
|
| 4 | Not at all | 95 |
42%
|
| Sysmiss | 31 |