| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1596 | 
                                                                 
                                    
                                    97.8%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 32 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 9 | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 11 | .Z | 17122 |