| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 2012 | 3 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 2013 | 10 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 2014 | 4 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 2015 | 3 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 2016 | 33 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 2017 | 434 | 
                                                                 
                                    
                                    45.8%
                                 
                                                             | 
                                                        
                    |
| 2018 | 459 | 
                                                                 
                                    
                                    48.5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 14416 |