| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 32 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 51 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 184 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 479 | 
                                                                 
                                    
                                    24.5%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 1212 | 
                                                                 
                                    
                                    61.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1980 |