| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
1%
|
|
| 1 | Every few days | 107 |
15.5%
|
| 2 | Every few weeks | 158 |
22.9%
|
| 3 | Every few months | 247 |
35.7%
|
| 4 | Not at all | 172 |
24.9%
|
| Sysmiss | 60 |