| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 19941 | 
                                    
                                    98.9%
                                 | 
| 2 | Yes - Some difficulty | 162 | 
                                    
                                    0.8%
                                 | 
| 3 | Yes - A lot of difficulty | 46 | 
                                    
                                    0.2%
                                 | 
| 4 | Cannot perform activity at all | 7 | 
                                    
                                    0%
                                 | 
| Sysmiss | 3237 |