| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 6151 | 
                                                                 
                                    
                                    99.1%
                                 
                                                             | 
                                                        
                    
| 2 | Yes - some difficulty | 39 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 3 | Yes - a lot of difficulty | 11 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 4 | Cannot perform activity at all | 7 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1474 |