| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
1.1%
|
| 2 | Every few weeks | 22 |
8.3%
|
| 3 | Every few months | 33 |
12.5%
|
| 4 | Not at all | 207 |
78.1%
|
| Sysmiss | 77 |