| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3512 | 
                                    
                                    89.4%
                                 | 
| 2 | Mild | 231 | 
                                    
                                    5.9%
                                 | 
| 3 | Moderate | 128 | 
                                    
                                    3.3%
                                 | 
| 4 | Severe | 44 | 
                                    
                                    1.1%
                                 | 
| 5 | Extreme | 13 | 
                                    
                                    0.3%
                                 | 
| Sysmiss | 10 |