| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very weak | 30 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 2 | Weak | 156 | 
                                                                 
                                    
                                    10.1%
                                 
                                                             | 
                                                        
                    
| 3 | Average | 606 | 
                                                                 
                                    
                                    39.4%
                                 
                                                             | 
                                                        
                    
| 4 | High | 648 | 
                                                                 
                                    
                                    42.1%
                                 
                                                             | 
                                                        
                    
| 5 | Very high | 99 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             |