| Value | Category | Cases | |
|---|---|---|---|
| -99 | 14 |
9.9%
|
|
| 1 | Every few days | 14 |
9.9%
|
| 2 | Every few weeks | 36 |
25.4%
|
| 3 | Every few months | 52 |
36.6%
|
| 4 | Not at all | 26 |
18.3%
|
| Sysmiss | 25 |