| Value | Category | Cases | |
|---|---|---|---|
| -99 | 20 |
9.1%
|
|
| 1 | Every few days | 17 |
7.7%
|
| 2 | Every few weeks | 37 |
16.8%
|
| 3 | Every few months | 60 |
27.3%
|
| 4 | Not at all | 86 |
39.1%
|
| Sysmiss | 40 |