| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 2006 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 2007 | 2 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 2008 | 5 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 2009 | 6 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    |
| 2010 | 22 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    |
| 2011 | 28 | 
                                                                 
                                    
                                    19.3%
                                 
                                                             | 
                                                        
                    |
| 2012 | 32 | 
                                                                 
                                    
                                    22.1%
                                 
                                                             | 
                                                        
                    |
| 2013 | 36 | 
                                                                 
                                    
                                    24.8%
                                 
                                                             | 
                                                        
                    |
| 2014 | 12 | 
                                                                 
                                    
                                    8.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 5630 |