| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1 | Very easy | 28 | 
                                    
                                    2.3%
                                 | 
| 2 | Easy | 172 | 
                                    
                                    14.3%
                                 | 
| 3 | Difficult | 478 | 
                                    
                                    39.8%
                                 | 
| 4 | Very difficult | 403 | 
                                    
                                    33.6%
                                 | 
| 7 | Don't have to pay taxes | 76 | 
                                    
                                    6.3%
                                 | 
| 9 | Don't Know | 43 | 
                                    
                                    3.6%
                                 | 
| 98 | Refused | 0 | 
                                    
                                    0%
                                 |