| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 19755 | 
                                    
                                    98%
                                 | 
| 2 | Yes - Some difficulty | 326 | 
                                    
                                    1.6%
                                 | 
| 3 | Yes - A lot of difficulty | 62 | 
                                    
                                    0.3%
                                 | 
| 4 | Cannot perform activity at all | 12 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 3238 |