| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 48 | 
                                                                 
                                    
                                    31.6%
                                 
                                                             | 
                                                        
                    
| 2 | No | 104 | 
                                                                 
                                    
                                    68.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 212 |