| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 25 | 
                                                                 
                                    
                                    12.1%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 171 | 
                                                                 
                                    
                                    82.6%
                                 
                                                             | 
                                                        
                    
| 8 | dk | 11 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5 |