| Value | Category | Cases | |
|---|---|---|---|
| 0 | not weighed | 1676 | 
                                                                 
                                    
                                    26%
                                 
                                                             | 
                                                        
                    
| 1 | from card | 1504 | 
                                                                 
                                    
                                    23.3%
                                 
                                                             | 
                                                        
                    
| 2 | from recall | 3223 | 
                                                                 
                                    
                                    50%
                                 
                                                             | 
                                                        
                    
| 8 | dk | 13 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 9 | special answers | 32 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 11 | .Z | 12306 |