| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 28 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 41 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 277 | 
                                                                 
                                    
                                    14.2%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 990 | 
                                                                 
                                    
                                    50.6%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 621 | 
                                                                 
                                    
                                    31.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |