| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 9 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 55 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 259 | 
                                                                 
                                    
                                    13.2%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 1075 | 
                                                                 
                                    
                                    54.9%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 559 | 
                                                                 
                                    
                                    28.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |