| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4941 | 
                                    
                                    84.5%
                                 | 
| 2 | SOME DIFFICULTY | 707 | 
                                    
                                    12.1%
                                 | 
| 3 | A LOT OF DIFFICULTY | 61 | 
                                    
                                    1%
                                 | 
| 4 | CANNOT REMEMBER THINGS AT ALL | 5 | 
                                    
                                    0.1%
                                 | 
| 9 | NO RESPONSE | 2 | 
                                    
                                    0%
                                 | 
| Sysmiss | 134 | 
                                    
                                    2.3%
                                 |