| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 847 |
28.3%
|
| 1 | Yes | 1133 |
37.8%
|
| 77 | Don't know | 963 |
32.1%
|
| 99 | Refuse | 54 |
1.8%
|
| Sysmiss | 3223 |