| Value | Category | Cases | |
|---|---|---|---|
| -9 | 3 |
0.4%
|
|
| -7 | 81 |
9.6%
|
|
| 1 | 22 |
2.6%
|
|
| 2 | 741 |
87.5%
|
|
| Sysmiss | 453 |