| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.3%
|
| 2 | Every few weeks | 15 |
4.9%
|
| 3 | Every few months | 38 |
12.3%
|
| 4 | Not at all | 248 |
80.5%
|
| Sysmiss | 60 |