| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 34 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 109 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 380 | 
                                                                 
                                    
                                    19.4%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 1104 | 
                                                                 
                                    
                                    56.4%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 330 | 
                                                                 
                                    
                                    16.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |