| Value | Category | Cases | |
|---|---|---|---|
| 1 | Don't know | 425 | 
                                                                 
                                    
                                    35.5%
                                 
                                                             | 
                                                        
                    
| 2 | Know but can't remember | 134 | 
                                                                 
                                    
                                    11.2%
                                 
                                                             | 
                                                        
                    
| 3 | Right answer | 257 | 
                                                                 
                                    
                                    21.5%
                                 
                                                             | 
                                                        
                    
| 4 | Wrong answer | 20 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    
| 5 | Could not determine | 68 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    
| 98 | Refused | 3 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 99 | Missing | 291 | 
                                                                 
                                    
                                    24.3%
                                 
                                                             |