| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
1.7%
|
| 2 | Every few weeks | 26 |
8.7%
|
| 3 | Every few months | 102 |
34.1%
|
| 4 | Not at all | 166 |
55.5%
|
| Sysmiss | 56 |