| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 591 |
18.6%
|
| 1 | Yes | 1341 |
42.2%
|
| 77 | Don't know | 1199 |
37.8%
|
| 99 | Refuse | 44 |
1.4%
|
| Sysmiss | 3045 |