| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.9%
|
| 2 | Every few weeks | 26 |
12.3%
|
| 3 | Every few months | 123 |
58.3%
|
| 4 | Not at all | 58 |
27.5%
|
| Sysmiss | 15 |