| Value | Category | Cases | |
|---|---|---|---|
| 28 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 29 | 23 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 30 | 113 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    |
| 31 | 471 | 
                                                                 
                                    
                                    77.3%
                                 
                                                             |