| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 20 | 
                                    
                                    1.7%
                                 | 
| 2 | Easy | 83 | 
                                    
                                    6.9%
                                 | 
| 3 | Difficult | 73 | 
                                    
                                    6.1%
                                 | 
| 4 | Very Difficult | 53 | 
                                    
                                    4.4%
                                 | 
| 7 | Not Applicable | 971 | 
                                    
                                    80.9%
                                 | 
| 8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 9 | Don't Know | 0 | 
                                    
                                    0%
                                 |