| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 2 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2001 | 5 | 
                                                                 
                                    
                                    17.9%
                                 
                                                             | 
                                                        
                    |
| 2002 | 5 | 
                                                                 
                                    
                                    17.9%
                                 
                                                             | 
                                                        
                    |
| 2003 | 8 | 
                                                                 
                                    
                                    28.6%
                                 
                                                             | 
                                                        
                    |
| 2004 | 8 | 
                                                                 
                                    
                                    28.6%
                                 
                                                             |