| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 94 | 
                                                                 
                                    
                                    32.9%
                                 
                                                             | 
                                                        
                    
| 2 | No | 184 | 
                                                                 
                                    
                                    64.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1160 |