| Value | Category | Cases | |
|---|---|---|---|
| -9 | 1 | 
                                    
                                    0.5%
                                 | |
| -7 | 22 | 
                                    
                                    10.2%
                                 | |
| 1 | 143 | 
                                    
                                    66.5%
                                 | |
| 2 | 49 | 
                                    
                                    22.8%
                                 |