| Value | Category | Cases | |
|---|---|---|---|
| -9 | 10 | 
                                    
                                    4.7%
                                 | |
| -7 | 10 | 
                                    
                                    4.7%
                                 | |
| -6 | 4 | 
                                    
                                    1.9%
                                 | |
| 1 | 20 | 
                                    
                                    9.3%
                                 | |
| 2 | 171 | 
                                    
                                    79.5%
                                 |