| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 631 | 
                                                                 
                                    
                                    78.3%
                                 
                                                             | 
                                                        
                    
| 2 | no | 175 | 
                                                                 
                                    
                                    21.7%
                                 
                                                             | 
                                                        
                    
| 9 | not stated | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 587 |