| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 33 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 52 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 622 | 
                                                                 
                                    
                                    44%
                                 
                                                             | 
                                                        
                    
| 2 | No | 706 | 
                                                                 
                                    
                                    50%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 33 |