| Value | Category | Cases | |
|---|---|---|---|
| -9 | 47 | 
                                    
                                    21.9%
                                 | |
| -7 | 13 | 
                                    
                                    6%
                                 | |
| 1 | 11 | 
                                    
                                    5.1%
                                 | |
| 2 | 21 | 
                                    
                                    9.8%
                                 | |
| 3 | 95 | 
                                    
                                    44.2%
                                 | |
| 4 | 28 | 
                                    
                                    13%
                                 |