| Value | Category | Cases | |
|---|---|---|---|
| -99 | 12 |
4%
|
|
| 1 | Every few days | 49 |
16.5%
|
| 2 | Every few weeks | 53 |
17.8%
|
| 3 | Every few months | 76 |
25.6%
|
| 4 | Not at all | 107 |
36%
|
| Sysmiss | 78 |