| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 29 | 
                                    
                                    2.4%
                                 | 
| 2 | Easy | 83 | 
                                    
                                    6.9%
                                 | 
| 3 | Difficult | 57 | 
                                    
                                    4.8%
                                 | 
| 4 | Very Difficult | 59 | 
                                    
                                    4.9%
                                 | 
| 7 | Not Applicable | 971 | 
                                    
                                    80.9%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't Know | 1 | 
                                    
                                    0.1%
                                 |