| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 101 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 234 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 597 | 
                                                                 
                                    
                                    30.5%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 840 | 
                                                                 
                                    
                                    42.9%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 188 | 
                                                                 
                                    
                                    9.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1978 |