| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 204 | 
                                                                 
                                    
                                    50.4%
                                 
                                                             | 
                                                        
                    
| 2 | No | 176 | 
                                                                 
                                    
                                    43.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2550 |