| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 27 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 692 | 
                                                                 
                                    
                                    49.1%
                                 
                                                             | 
                                                        
                    
| 2 | No | 679 | 
                                                                 
                                    
                                    48.2%
                                 
                                                             |