| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
3.5%
|
| 2 | Every few weeks | 8 |
7.1%
|
| 3 | Every few months | 61 |
54%
|
| 4 | Not at all | 40 |
35.4%
|
| Sysmiss | 21 |