| Value | Category | Cases | |
|---|---|---|---|
| -3 | Not applicable | 600 | 
                                    
                                    50.4%
                                 | 
| 0 | 0 | 249 | 
                                    
                                    20.9%
                                 | 
| 1 | 1 | 148 | 
                                    
                                    12.4%
                                 | 
| 2 | 2 | 105 | 
                                    
                                    8.8%
                                 | 
| 3 | 3 | 73 | 
                                    
                                    6.1%
                                 | 
| 4 | 4 | 9 | 
                                    
                                    0.8%
                                 | 
| 5 | 5 | 6 | 
                                    
                                    0.5%
                                 |