| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
1%
|
|
| 1 | Every few days | 20 |
9.8%
|
| 2 | Every few weeks | 39 |
19%
|
| 3 | Every few months | 107 |
52.2%
|
| 4 | Not at all | 37 |
18%
|
| Sysmiss | 20 |