| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 133 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    
| 2 | Mild | 426 | 
                                                                 
                                    
                                    21.8%
                                 
                                                             | 
                                                        
                    
| 3 | Moderate | 712 | 
                                                                 
                                    
                                    36.5%
                                 
                                                             | 
                                                        
                    
| 4 | Severe | 590 | 
                                                                 
                                    
                                    30.2%
                                 
                                                             | 
                                                        
                    
| 5 | Extreme | 92 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1985 |