| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.7%
|
| 2 | Every few weeks | 29 |
11.1%
|
| 3 | Every few months | 73 |
27.9%
|
| 4 | Not at all | 153 |
58.4%
|
| Sysmiss | 80 |