| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.2%
|
| 2 | Every few weeks | 10 |
6.2%
|
| 3 | Every few months | 24 |
14.8%
|
| 4 | Not at all | 126 |
77.8%
|
| Sysmiss | 29 |