| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 2112 | 
                                                         
                                
                                34.5%
                                                             
                                                     | 
                                            
| 1 | Yes | 2246 | 
                                                         
                                
                                36.7%
                                                             
                                                     | 
                                            
| 8 | Don't know | 1758 | 
                                                         
                                
                                28.7%
                                                             
                                                     |