| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1002 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 379 | 
                                                                 
                                    
                                    7%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 1271 | 
                                                                 
                                    
                                    23.6%
                                 
                                                             | 
                                                        
                    
| 2 | No | 2736 | 
                                                                 
                                    
                                    50.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5284 |