| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
1.7%
|
| 2 | Every few weeks | 38 |
12.9%
|
| 3 | Every few months | 122 |
41.4%
|
| 4 | Not at all | 130 |
44.1%
|
| Sysmiss | 73 |