| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 9 | 
                                    
                                    0.8%
                                 | 
| 2 | Easy | 20 | 
                                    
                                    1.7%
                                 | 
| 3 | Difficult | 5 | 
                                    
                                    0.4%
                                 | 
| 4 | Very Difficult | 10 | 
                                    
                                    0.8%
                                 | 
| 7 | No contact | 1155 | 
                                    
                                    96.3%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 1 | 
                                    
                                    0.1%
                                 |