| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 150 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 511 | 
                                                                 
                                    
                                    26.1%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 632 | 
                                                                 
                                    
                                    32.3%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 574 | 
                                                                 
                                    
                                    29.3%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 90 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1981 |