| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Very much difficult | 13 | 
                                                                 
                                    
                                    12.9%
                                 
                                                             | 
                                                        
                    
| 2 | Moderately difficult | 46 | 
                                                                 
                                    
                                    45.5%
                                 
                                                             | 
                                                        
                    
| 3 | Somewhat difficult | 28 | 
                                                                 
                                    
                                    27.7%
                                 
                                                             | 
                                                        
                    
| 4 | Not difficult at all | 14 | 
                                                                 
                                    
                                    13.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 263 |