| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 16202 | 
                                                                 
                                    
                                    86.4%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 1651 | 
                                                                 
                                    
                                    8.8%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 896 | 
                                                                 
                                    
                                    4.8%
                                 
                                                             | 
                                                        
                    
| 9 | 5 | 
                                                                 
                                    
                                    0%
                                 
                                                             |