| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 0 |
0%
|
| -888 | -888 | 0 |
0%
|
| -777 | Not Applicable | 3 |
0.6%
|
| 0 | No | 11 |
2.3%
|
| 1 | Yes | 457 |
97%
|
| Sysmiss | 441 |