| Value | Category | Cases | |
|---|---|---|---|
| -1 | Dont know | 7 | 
                                    
                                    0.6%
                                 | 
| 1 | None of them | 26 | 
                                    
                                    2.2%
                                 | 
| 2 | Few of them | 281 | 
                                    
                                    23.6%
                                 | 
| 3 | Most of them | 533 | 
                                    
                                    44.8%
                                 | 
| 4 | All of them | 343 | 
                                    
                                    28.8%
                                 |