| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                                                 
                                    
                                    9.6%
                                 
                                                             | 
                                                        
                    
| 1 | Very much difficult | 6 | 
                                                                 
                                    
                                    11.5%
                                 
                                                             | 
                                                        
                    
| 2 | Moderately difficult | 19 | 
                                                                 
                                    
                                    36.5%
                                 
                                                             | 
                                                        
                    
| 3 | Somewhat difficult | 12 | 
                                                                 
                                    
                                    23.1%
                                 
                                                             | 
                                                        
                    
| 4 | Not difficult at all | 10 | 
                                                                 
                                    
                                    19.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 98 |