| Value | Category | Cases | |
|---|---|---|---|
| -99 | 77 |
26.6%
|
|
| 1 | Every few days | 18 |
6.2%
|
| 2 | Every few weeks | 31 |
10.7%
|
| 3 | Every few months | 84 |
29%
|
| 4 | Not at all | 80 |
27.6%
|
| Sysmiss | 85 |