| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.8%
|
| 2 | Every few weeks | 9 |
7.4%
|
| 3 | Every few months | 25 |
20.5%
|
| 4 | Not at all | 87 |
71.3%
|
| Sysmiss | 22 |