| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 1 | 
                                    
                                    0.3%
                                 | |
| 2013 | 1 | 
                                    
                                    0.3%
                                 | |
| 2015 | 1 | 
                                    
                                    0.3%
                                 | |
| 2017 | 7 | 
                                    
                                    1.9%
                                 | |
| 2018 | 120 | 
                                    
                                    33%
                                 | |
| 2019 | 234 | 
                                    
                                    64.3%
                                 | |
| Sysmiss | 3663 |