| Value | Category | Cases | |
|---|---|---|---|
| -9 | 19 | 
                                    
                                    8.8%
                                 | |
| -7 | 1 | 
                                    
                                    0.5%
                                 | |
| 1 | 8 | 
                                    
                                    3.7%
                                 | |
| 2 | 33 | 
                                    
                                    15.3%
                                 | |
| 3 | 45 | 
                                    
                                    20.9%
                                 | |
| 4 | 109 | 
                                    
                                    50.7%
                                 |