| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 23 | 
                                    
                                    1.9%
                                 | 
| 2 | Easy | 39 | 
                                    
                                    3.3%
                                 | 
| 3 | Difficult | 37 | 
                                    
                                    3.1%
                                 | 
| 4 | Very Difficult | 55 | 
                                    
                                    4.6%
                                 | 
| 7 | No contact | 1045 | 
                                    
                                    87.1%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 1 | 
                                    
                                    0.1%
                                 |