| Value | Category | Cases | |
|---|---|---|---|
| -9 | Refuse to answer | 2 |
0.1%
|
| -8 | I don't know | 28 |
1.6%
|
| 0 | No | 1336 |
77.6%
|
| 1 | Yes | 355 |
20.6%
|
| Sysmiss | 1083 |