| Value | Category | Cases | |
|---|---|---|---|
| 0 | 44 | 
                                                                 
                                    
                                    71%
                                 
                                                             | 
                                                        
                    |
| 1 | 18 | 
                                                                 
                                    
                                    29%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 271 |