| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (don't know) | 0 |
0%
|
| -66 | -66 (refuse to answer) | 0 |
0%
|
| 0 | No | 33 |
71.7%
|
| 1 | Yes | 13 |
28.3%
|
| Sysmiss | 1070 |