| Value | Category | Cases | |
|---|---|---|---|
| -9 | 7 |
2.2%
|
|
| -7 | 36 |
11.2%
|
|
| 1 | 22 |
6.8%
|
|
| 2 | 257 |
79.8%
|
|
| Sysmiss | 80 |