| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3274 | 
                                                                 
                                    
                                    84%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 348 | 
                                                                 
                                    
                                    8.9%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 158 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 68 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 51 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 39 |