| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 151 | 
                                                                 
                                    
                                    71.2%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 52 | 
                                                                 
                                    
                                    24.5%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 9 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             |