| Value | Category | Cases | |
|---|---|---|---|
| a | 199 | 
                                                                 
                                    
                                    23.7%
                                 
                                                             | 
                                                        
                    |
| b | 330 | 
                                                                 
                                    
                                    39.4%
                                 
                                                             | 
                                                        
                    |
| c | 63 | 
                                                                 
                                    
                                    7.5%
                                 
                                                             | 
                                                        
                    |
| d | 179 | 
                                                                 
                                    
                                    21.4%
                                 
                                                             | 
                                                        
                    |
| z | 67 | 
                                                                 
                                    
                                    8%
                                 
                                                             |