| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 9083 | 
                                    
                                    79.2%
                                 | 
| 2 | SOME DIFFICULTY | 594 | 
                                    
                                    5.2%
                                 | 
| 3 | A LOT OF DIFFICULTY | 107 | 
                                    
                                    0.9%
                                 | 
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 5 | 
                                    
                                    0%
                                 | 
| 9 | NO RESPONSE | 5 | 
                                    
                                    0%
                                 | 
| Sysmiss | 1670 | 
                                    
                                    14.6%
                                 |