| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 1 | 
                                    
                                    0.7%
                                 | |
| 2012 | 1 | 
                                    
                                    0.7%
                                 | |
| 2013 | 3 | 
                                    
                                    2%
                                 | |
| 2014 | 2 | 
                                    
                                    1.3%
                                 | |
| 2015 | 16 | 
                                    
                                    10.5%
                                 | |
| 2016 | 19 | 
                                    
                                    12.4%
                                 | |
| 2017 | 30 | 
                                    
                                    19.6%
                                 | |
| 2018 | 25 | 
                                    
                                    16.3%
                                 | |
| 2019 | 31 | 
                                    
                                    20.3%
                                 | |
| 2020 | 23 | 
                                    
                                    15%
                                 | |
| 2021 | 2 | 
                                    
                                    1.3%
                                 | |
| Sysmiss | 1347 |