| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 4727 | 
                                                                 
                                    
                                    98.9%
                                 
                                                             | 
                                                        
                    
| 1 | knows no method | 33 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 9 | 21 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 11 | .Z | 13973 |