| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 28 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 88 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 288 | 
                                                                 
                                    
                                    14.7%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 966 | 
                                                                 
                                    
                                    49.3%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 591 | 
                                                                 
                                    
                                    30.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1977 |