| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1000 | 
                                                                 
                                    
                                    18.9%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 339 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 1213 | 
                                                                 
                                    
                                    23%
                                 
                                                             | 
                                                        
                    
| 2 | No | 2732 | 
                                                                 
                                    
                                    51.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5388 |