| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 60 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 100 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 298 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 890 | 
                                                                 
                                    
                                    45.5%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 609 | 
                                                                 
                                    
                                    31.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |