| Value | Category | Cases | |
|---|---|---|---|
| 0 | 437 | 
                                                                 
                                    
                                    8.5%
                                 
                                                             | 
                                                        
                    |
| 1 | 1058 | 
                                                                 
                                    
                                    20.6%
                                 
                                                             | 
                                                        
                    |
| Missing value | 3642 | 
                                                                 
                                    
                                    70.9%
                                 
                                                             |