| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 197 | 
                                                                 
                                    
                                    20%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 374 | 
                                                                 
                                    
                                    38%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 305 | 
                                                                 
                                    
                                    31%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 70 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 37 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2955 |