| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 16 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 75 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 283 | 
                                                                 
                                    
                                    28.7%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 506 | 
                                                                 
                                    
                                    51.4%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 105 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2953 |