| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
3.1%
|
| 2 | Every few weeks | 15 |
23.4%
|
| 3 | Every few months | 31 |
48.4%
|
| 4 | Not at all | 16 |
25%
|
| Sysmiss | 22 |