| Value | Category | Cases | |
|---|---|---|---|
| 2 | SOME DIFFICULTY | 20 | 
                                    
                                    0.4%
                                 | 
| 3 | A LOT OF DIFFICULTY | 8 | 
                                    
                                    0.1%
                                 | 
| 4 | CANNOT WALK 100 M/Y AT ALL | 6 | 
                                    
                                    0.1%
                                 | 
| 9 | NO RESPONSE | 3 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 5442 | 
                                    
                                    99.3%
                                 |