| Value | Category | Cases | |
|---|---|---|---|
| -88 | don't know | 1 |
0.2%
|
| -66 | refuse to answer | 2 |
0.5%
|
| 0 | No | 433 |
97.7%
|
| 1 | Yes | 7 |
1.6%
|
| Sysmiss | 57 |