| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 5308 | 
                                                                 
                                    
                                    75%
                                 
                                                             | 
                                                        
                    
| 2 | SOME DIFFICULTY | 291 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 3 | A LOT OF DIFFICULTY | 72 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 3 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1404 | 
                                                                 
                                    
                                    19.8%
                                 
                                                             |