| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (Don't know) | 2 |
0.5%
|
| -66 | -66 (refuse to answer) | 9 |
2.4%
|
| 0 | No | 303 |
79.3%
|
| 1 | Yes | 68 |
17.8%
|
| Sysmiss | 997 |