| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 57 | 
                                                                 
                                    
                                    23.7%
                                 
                                                             | 
                                                        
                    
| 2 | No | 181 | 
                                                                 
                                    
                                    75.1%
                                 
                                                             |