| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.6%
|
| 2 | Every few weeks | 16 |
12.9%
|
| 3 | Every few months | 38 |
30.6%
|
| 4 | Not at all | 18 |
14.5%
|
| Sysmiss | 50 |
40.3%
|