| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 155 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    
| 2 | SOME DIFFICULTY | 37 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 3 | A LOT OF DIFFICULTY | 28 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 4 | CANNOT WALK 100 M AT ALL | 37 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 9 | NO RESPONSE | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 14432 | 
                                                                 
                                    
                                    98.2%
                                 
                                                             |