| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 24 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| -6 | Still in process | 3 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 56 | 
                                                                 
                                    
                                    9.6%
                                 
                                                             | 
                                                        
                    
| 2 | No | 498 | 
                                                                 
                                    
                                    85.7%
                                 
                                                             |