| Value | Category | Cases | |
|---|---|---|---|
| 0 | not weighed | 636 | 
                                    
                                    15.9%
                                 | 
| 1 | from card | 1766 | 
                                    
                                    44.3%
                                 | 
| 2 | from recall | 816 | 
                                    
                                    20.5%
                                 | 
| 9 | special answers | 771 | 
                                    
                                    19.3%
                                 | 
| Sysmiss | 10957 |