| Value | Category | Cases | |
|---|---|---|---|
| 0 | 711 | 
                                                                 
                                    
                                    22.1%
                                 
                                                             | 
                                                        
                    |
| 1 | 778 | 
                                                                 
                                    
                                    24.2%
                                 
                                                             | 
                                                        
                    |
| Missing value | 1727 | 
                                                                 
                                    
                                    53.7%
                                 
                                                             |