| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (Don't know) | 0 |
0%
|
| -66 | -66 (refuse to answer) | 0 |
0%
|
| 0 | No | 4 |
80%
|
| 1 | Yes | 1 |
20%
|
| Sysmiss | 1374 |