| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 4 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 14 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 40 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 406 | 
                                                                 
                                    
                                    41.3%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 519 | 
                                                                 
                                    
                                    52.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2955 |