| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 2006 | 9 | 
                                                                 
                                    
                                    4%
                                 
                                                             | 
                                                        
                    |
| 2007 | 17 | 
                                                                 
                                    
                                    7.5%
                                 
                                                             | 
                                                        
                    |
| 2008 | 12 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 2009 | 12 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 2010 | 12 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 2011 | 5 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 2012 | 11 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    |
| 2013 | 44 | 
                                                                 
                                    
                                    19.5%
                                 
                                                             | 
                                                        
                    |
| 2014 | 31 | 
                                                                 
                                    
                                    13.7%
                                 
                                                             | 
                                                        
                    |
| 2015 | 48 | 
                                                                 
                                    
                                    21.2%
                                 
                                                             | 
                                                        
                    |
| 2016 | 24 | 
                                                                 
                                    
                                    10.6%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 2291 |