| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1402 | 
                                                                 
                                    
                                    64.8%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 761 | 
                                                                 
                                    
                                    35.2%
                                 
                                                             | 
                                                        
                    
| 8 | don't know year | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 11 | .Z | 6069 |