| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 2006 | 7 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 2007 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 2008 | 11 | 
                                                                 
                                    
                                    8.5%
                                 
                                                             | 
                                                        
                    |
| 2009 | 24 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    |
| 2010 | 51 | 
                                                                 
                                    
                                    39.5%
                                 
                                                             | 
                                                        
                    |
| 2011 | 26 | 
                                                                 
                                    
                                    20.2%
                                 
                                                             | 
                                                        
                    |
| 2012 | 4 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 8888 | Don't Know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9999 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2745 |