| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
9.7%
|
| 2 | Every few weeks | 18 |
14.5%
|
| 3 | Every few months | 74 |
59.7%
|
| 4 | Not at all | 20 |
16.1%
|
| Sysmiss | 17 |