| Value | Category | Cases | |
|---|---|---|---|
| -99 | 11 |
3.3%
|
|
| 1 | Every few days | 6 |
1.8%
|
| 2 | Every few weeks | 29 |
8.7%
|
| 3 | Every few months | 99 |
29.6%
|
| 4 | Not at all | 140 |
41.8%
|
| Sysmiss | 50 |
14.9%
|