| Value | Category | Cases | |
|---|---|---|---|
| 1 | can not read at all | 16185 | 
                                                                 
                                    
                                    27.5%
                                 
                                                             | 
                                                        
                    
| 2 | can read part of the sentense | 8120 | 
                                                                 
                                    
                                    13.8%
                                 
                                                             | 
                                                        
                    
| 3 | can read whole sentense | 34187 | 
                                                                 
                                    
                                    58%
                                 
                                                             | 
                                                        
                    
| 4 | no sentense is required | 403 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             |