| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 9 | 
                                                                 
                                    
                                    12%
                                 
                                                             | 
                                                        
                    |
| 2001 | 8 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    |
| 2002 | 21 | 
                                                                 
                                    
                                    28%
                                 
                                                             | 
                                                        
                    |
| 2003 | 25 | 
                                                                 
                                    
                                    33.3%
                                 
                                                             | 
                                                        
                    |
| 2004 | 12 | 
                                                                 
                                    
                                    16%
                                 
                                                             |