| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 455 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 17518 | 
                                                                 
                                    
                                    93.4%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 773 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 9 | 8 | 
                                                                 
                                    
                                    0%
                                 
                                                             |