| Value | Category | Cases | |
|---|---|---|---|
| 0 | 55 | 
                                                                 
                                    
                                    73.3%
                                 
                                                             | 
                                                        
                    |
| 1 | 20 | 
                                                                 
                                    
                                    26.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 21 |