| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1378 | 
                                                                 
                                    
                                    36.4%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 2312 | 
                                                                 
                                    
                                    61%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 80 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    
| 9 | 18 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 11 | .Z | 14966 |