| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 2 | 
                                    
                                    0.2%
                                 | |
| 2017 | 37 | 
                                    
                                    3.9%
                                 | |
| 2018 | 112 | 
                                    
                                    11.8%
                                 | |
| 2019 | 310 | 
                                    
                                    32.7%
                                 | |
| 2020 | 482 | 
                                    
                                    50.8%
                                 | |
| 2021 | 5 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 361 |