| Value | Category | Cases | |
|---|---|---|---|
| 0 | 489 | 
                                                                 
                                    
                                    23.7%
                                 
                                                             | 
                                                        
                    |
| 1 | 110 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 98 | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| Missing value | 1459 | 
                                                                 
                                    
                                    70.8%
                                 
                                                             |