| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 18 | 
                                    
                                    1.5%
                                 | 
| 2 | Easy | 32 | 
                                    
                                    2.7%
                                 | 
| 3 | Difficult | 20 | 
                                    
                                    1.7%
                                 | 
| 4 | Very Difficult | 33 | 
                                    
                                    2.8%
                                 | 
| 7 | Not applicable | 1097 | 
                                    
                                    91.4%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |