| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 59229 | 
                                                                 
                                    
                                    96.8%
                                 
                                                             | 
                                                        
                    
| 2 | Yes - some difficulty | 1479 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| 3 | Yes - a lot of difficulty | 297 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 4 | Cannot do at all | 168 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9463 |