| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 7 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 149 | 
                                                                 
                                    
                                    95.5%
                                 
                                                             | 
                                                        
                    
| 8 | dk | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 56 |