| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 143 | 
                                                                 
                                    
                                    67.5%
                                 
                                                             | 
                                                        
                    
| 1 | yes | 63 | 
                                                                 
                                    
                                    29.7%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 6 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             |