| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3661 | 
                                                                 
                                    
                                    70.1%
                                 
                                                             | 
                                                        
                    
| 2 | SOME DIFFICULTY | 83 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    
| 3 | A LOT OF DIFFICULTY | 4 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 9 | NO RESPONSE | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1476 | 
                                                                 
                                    
                                    28.2%
                                 
                                                             |