| Value | Category | Cases | |
|---|---|---|---|
| -9 | Refuse to answer | 2 |
0.2%
|
| -8 | I don't know | 1 |
0.1%
|
| 0 | No | 183 |
22.4%
|
| 1 | Yes | 631 |
77.2%
|
| Sysmiss | 1987 |