| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
0.9%
|
| 2 | Every few weeks | 14 |
6%
|
| 3 | Every few months | 87 |
37%
|
| 4 | Not at all | 132 |
56.2%
|
| Sysmiss | 54 |