| Value | Category | Cases | |
|---|---|---|---|
| -99 | 27 |
5.8%
|
|
| 1 | Every few days | 4 |
0.9%
|
| 2 | Every few weeks | 26 |
5.6%
|
| 3 | Every few months | 107 |
23.1%
|
| 4 | Not at all | 251 |
54.1%
|
| Sysmiss | 49 |
10.6%
|