| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1788 | 
                                    
                                    83%
                                 | 
| 2 | SOME DIFFICULTY | 76 | 
                                    
                                    3.5%
                                 | 
| 3 | A LOT OF DIFFICULTY | 2 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 287 | 
                                    
                                    13.3%
                                 |