| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 102 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 240 | 
                                                                 
                                    
                                    12.3%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 1133 | 
                                                                 
                                    
                                    57.9%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 479 | 
                                                                 
                                    
                                    24.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1980 |