| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.5%
|
| 2 | Every few weeks | 16 |
8.1%
|
| 3 | Every few months | 37 |
18.8%
|
| 4 | Not at all | 139 |
70.6%
|
| Sysmiss | 13 |