| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 321 | 
                                                                 
                                    
                                    30.2%
                                 
                                                             | 
                                                        
                    
| 2 | No | 743 | 
                                                                 
                                    
                                    69.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 368 |