| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 88 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 199 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| 2 | No | 2668 | 
                                                                 
                                    
                                    90.3%
                                 
                                                             |