| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 18 | 
                                                                 
                                    
                                    45%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 22 | 
                                                                 
                                    
                                    55%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 172 |