| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 39 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 233 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 557 | 
                                                                 
                                    
                                    28.5%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 875 | 
                                                                 
                                    
                                    44.7%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 253 | 
                                                                 
                                    
                                    12.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |