| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 11 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 122 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 427 | 
                                                                 
                                    
                                    21.8%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 1033 | 
                                                                 
                                    
                                    52.8%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 363 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1982 |