| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2003 | 7 | 
                                    
                                    9.9%
                                 | 
| 2 | 2007 | 1 | 
                                    
                                    1.4%
                                 | 
| 3 | 2010 | 2 | 
                                    
                                    2.8%
                                 | 
| 4 | 2011 | 2 | 
                                    
                                    2.8%
                                 | 
| 5 | 2013 | 2 | 
                                    
                                    2.8%
                                 | 
| 6 | 2014 | 1 | 
                                    
                                    1.4%
                                 | 
| 7 | 2015 | 3 | 
                                    
                                    4.2%
                                 | 
| 8 | 2016 | 4 | 
                                    
                                    5.6%
                                 | 
| 9 | 2017 | 9 | 
                                    
                                    12.7%
                                 | 
| 10 | 2018 | 9 | 
                                    
                                    12.7%
                                 | 
| 11 | 2019 | 30 | 
                                    
                                    42.3%
                                 | 
| 12 | 2020 | 1 | 
                                    
                                    1.4%
                                 |