| Value | Category | Cases | |
|---|---|---|---|
| 1 | Nil | 286 | 
                            
                             
                                
                                33.6%
                                                             
                            
                         | 
                        
                    
| 2 | Low | 278 | 
                            
                             
                                
                                32.7%
                                                             
                            
                         | 
                        
                    
| 3 | Moderate | 186 | 
                            
                             
                                
                                21.9%
                                                             
                            
                         | 
                        
                    
| 4 | High | 101 | 
                            
                             
                                
                                11.9%
                                                             
                            
                         |