| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.8%
|
| 2 | Every few weeks | 19 |
8.7%
|
| 3 | Every few months | 77 |
35.3%
|
| 4 | Not at all | 118 |
54.1%
|
| Sysmiss | 114 |