| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 40 |
0.2%
|
| 0 | No | 4238 |
18.3%
|
| 1 | Yes | 18519 |
79.8%
|
| 9 | Can't determine | 400 |
1.7%
|
| Sysmiss | 1104 |