| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 8 |
0.2%
|
| -888 | -888 | 31 |
0.7%
|
| 0 | No | 4379 |
98.6%
|
| 1 | Yes | 22 |
0.5%
|
| Sysmiss | 510 |