| Value | Category | Cases | |
|---|---|---|---|
| 0 | 51 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    |
| 1 | 317 | 
                                                                 
                                    
                                    58.6%
                                 
                                                             | 
                                                        
                    |
| Missing value | 173 | 
                                                                 
                                    
                                    32%
                                 
                                                             |