| Value | Category | Cases | |
|---|---|---|---|
| -9 | Refuse to answer | 3 |
0.4%
|
| -8 | I don't know | 3 |
0.4%
|
| 0 | No | 738 |
90.3%
|
| 1 | Yes | 73 |
8.9%
|
| Sysmiss | 1987 |