| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 21623 | 
                                                                 
                                    
                                    97.3%
                                 
                                                             | 
                                                        
                    
| 2 | SOME DIFFICULTY | 513 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    
| 3 | A LOT OF DIFFICULTY | 60 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 4 | CANNOT WALK 100 M/Y AT ALL | 15 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 9 | NO RESPONSE | 4 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 491 |