| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
1.8%
|
| 2 | Every few weeks | 23 |
8.5%
|
| 3 | Every few months | 44 |
16.2%
|
| 4 | Not at all | 200 |
73.5%
|
| Sysmiss | 70 |