| Value | Category | Cases | |
|---|---|---|---|
| -4 | 536 | 
                                    
                                    72.1%
                                 | |
| 0 | 27 | 
                                    
                                    3.6%
                                 | |
| 1 | 126 | 
                                    
                                    17%
                                 | |
| 2 | 54 | 
                                    
                                    7.3%
                                 |