| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 11003 | 
                                    
                                    77%
                                 | 
| 2 | SOME DIFFICULTY | 705 | 
                                    
                                    4.9%
                                 | 
| 3 | A LOT OF DIFFICULTY | 70 | 
                                    
                                    0.5%
                                 | 
| 4 | CANNOT WALK/ CLIMB STEPS AT ALL | 5 | 
                                    
                                    0%
                                 | 
| 9 | NO RESPONSE | 7 | 
                                    
                                    0%
                                 | 
| Sysmiss | 2507 | 
                                    
                                    17.5%
                                 |