| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 4 |
0.1%
|
| -888 | -888 | 40 |
0.9%
|
| 0 | No | 4518 |
98.4%
|
| 1 | Yes | 29 |
0.6%
|
| Sysmiss | 359 |