| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 928 | 
                                                                 
                                    
                                    82.5%
                                 
                                                             | 
                                                        
                    
| 2 | no | 197 | 
                                                                 
                                    
                                    17.5%
                                 
                                                             | 
                                                        
                    
| 9 | not stated | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 268 |