| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 20 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 69 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 149 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 730 | 
                                                                 
                                    
                                    37.4%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 984 | 
                                                                 
                                    
                                    50.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1986 |