| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 0 |
0%
|
| -88 | Missing | 0 |
0%
|
| -77 | NA | 6 |
0.1%
|
| 1 | Yes | 714 |
9.9%
|
| 2 | No | 6503 |
90%
|