| Value | Category | Cases | |
|---|---|---|---|
| -3 | Not applicable | 590 | 
                                    
                                    49.6%
                                 | 
| 0 | 0 | 302 | 
                                    
                                    25.4%
                                 | 
| 1 | 1 | 151 | 
                                    
                                    12.7%
                                 | 
| 2 | 2 | 85 | 
                                    
                                    7.1%
                                 | 
| 3 | 3 | 49 | 
                                    
                                    4.1%
                                 | 
| 4 | 4 | 13 | 
                                    
                                    1.1%
                                 |