| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 34 |
0.1%
|
| 0 | No | 4281 |
18.5%
|
| 1 | Yes | 18063 |
77.9%
|
| 9 | Can't determine | 819 |
3.5%
|
| Sysmiss | 1104 |