| Value | Category | Cases | |
|---|---|---|---|
| -9 | 724 | 
                                
                                18.3%
                             | |
| 0 | 2917 | 
                                
                                73.8%
                             | |
| 1 | 77 | 
                                
                                1.9%
                             | |
| 9 | 234 | 
                                
                                5.9%
                             |