| Value | Category | Cases | |
|---|---|---|---|
| 0 | cannot read at all | 1242 | 
                                    
                                    15.1%
                                 | 
| 1 | able to read only parts of sentence | 1641 | 
                                    
                                    19.9%
                                 | 
| 2 | able to read whole sentence | 5347 | 
                                    
                                    64.9%
                                 | 
| 3 | no card with required language | 0 | 
                                    
                                    0%
                                 | 
| 4 | blind/visually impaired | 3 | 
                                    
                                    0%
                                 | 
| 9 | 6 | 
                                    
                                    0.1%
                                 |