| Value | Category | Cases | |
|---|---|---|---|
| -4 | 307 | 
                                    
                                    41.3%
                                 | |
| 0 | 110 | 
                                    
                                    14.8%
                                 | |
| 1 | 52 | 
                                    
                                    7%
                                 | |
| 2 | 274 | 
                                    
                                    36.9%
                                 |