| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 30 |
4%
|
| -888 | -888 | 60 |
7.9%
|
| 1 | Before | 338 |
44.6%
|
| 2 | After | 329 |
43.5%
|
| Sysmiss | 4193 |