| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 11 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 2001 | 7 | 
                                                                 
                                    
                                    10.6%
                                 
                                                             | 
                                                        
                    |
| 2002 | 14 | 
                                                                 
                                    
                                    21.2%
                                 
                                                             | 
                                                        
                    |
| 2003 | 24 | 
                                                                 
                                    
                                    36.4%
                                 
                                                             | 
                                                        
                    |
| 2004 | 10 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             |