| Value | Category | Cases | |
|---|---|---|---|
| a | 55 | 
                                    
                                    2.9%
                                 | |
| ab | 10 | 
                                    
                                    0.5%
                                 | |
| abc | 20 | 
                                    
                                    1.1%
                                 | |
| ac | 10 | 
                                    
                                    0.5%
                                 | |
| ad | 21 | 
                                    
                                    1.1%
                                 | |
| bc | 10 | 
                                    
                                    0.5%
                                 | |
| c | 990 | 
                                    
                                    52.2%
                                 | |
| cd | 196 | 
                                    
                                    10.3%
                                 | |
| d | 583 | 
                                    
                                    30.8%
                                 |