| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| -6 | Still in process | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 528 | 
                                                                 
                                    
                                    34.8%
                                 
                                                             | 
                                                        
                    
| 2 | No | 982 | 
                                                                 
                                    
                                    64.7%
                                 
                                                             |