| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 1 |
0.2%
|
| -888 | -888 | 19 |
4.6%
|
| 0 | No | 40 |
9.7%
|
| 1 | Yes | 354 |
85.5%
|
| Sysmiss | 4536 |