| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 110 | 
                                    
                                    9.2%
                                 | 
| 2 | Easy | 359 | 
                                    
                                    29.9%
                                 | 
| 3 | Difficult | 173 | 
                                    
                                    14.4%
                                 | 
| 4 | Very Difficult | 79 | 
                                    
                                    6.6%
                                 | 
| 7 | Not Applicable | 479 | 
                                    
                                    39.9%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't Know | 0 | 
                                    
                                    0%
                                 |