| Value | Category | Cases | |
|---|---|---|---|
| -9 | REFUSED | 0 |
0%
|
| 1 | ALWAYS | 1 |
7.1%
|
| 2 | SOMETIMES | 3 |
21.4%
|
| 3 | NEVER | 10 |
71.4%
|
| Sysmiss | 7997 |