| Value | Category | Cases | |
|---|---|---|---|
| a | 378 | 
                                    
                                    20.6%
                                 | |
| ab | 401 | 
                                    
                                    21.8%
                                 | |
| abc | 654 | 
                                    
                                    35.6%
                                 | |
| ac | 249 | 
                                    
                                    13.5%
                                 | |
| b | 51 | 
                                    
                                    2.8%
                                 | |
| bc | 31 | 
                                    
                                    1.7%
                                 | |
| c | 75 | 
                                    
                                    4.1%
                                 |