| Value | Category | Cases | |
|---|---|---|---|
| -999 | 1 | 0 |
0%
|
| -997 | 2 | 36 |
9.1%
|
| 0 | 3 | 360 |
90.9%
|
| 99999 | 4 | 0 |
0%
|
| Sysmiss | 93 |