| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 | 
                                    
                                    0.5%
                                 | |
| 2015 | 4 | 
                                    
                                    0.5%
                                 | |
| 2016 | 57 | 
                                    
                                    6.7%
                                 | |
| 2017 | 74 | 
                                    
                                    8.7%
                                 | |
| 2018 | 154 | 
                                    
                                    18.2%
                                 | |
| 2019 | 282 | 
                                    
                                    33.3%
                                 | |
| 2020 | 273 | 
                                    
                                    32.2%
                                 | |
| Sysmiss | 207 |