| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 750 | 
                                                                 
                                    
                                    38.3%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 300 | 
                                                                 
                                    
                                    15.3%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 274 | 
                                                                 
                                    
                                    14%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 474 | 
                                                                 
                                    
                                    24.2%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 160 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1980 |