| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 37 | 
                                                                 
                                    
                                    7.2%
                                 
                                                             | 
                                                        
                    |
| 2006 | 194 | 
                                                                 
                                    
                                    37.6%
                                 
                                                             | 
                                                        
                    |
| 2007 | 162 | 
                                                                 
                                    
                                    31.4%
                                 
                                                             | 
                                                        
                    |
| 2008 | 103 | 
                                                                 
                                    
                                    20%
                                 
                                                             | 
                                                        
                    |
| 2009 | 15 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 2010 | 3 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 9997 | inconsistent | 2 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| 9998 | dk | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 10001 | .Z | 18238 |