| Value | Category | Cases | |
|---|---|---|---|
| 2009 or earlier | 18927 | 
                                    
                                    8.8%
                                 | |
| 2010 | 1723 | 
                                    
                                    0.8%
                                 | |
| 2011 | 1191 | 
                                    
                                    0.6%
                                 | |
| 2012 | 1544 | 
                                    
                                    0.7%
                                 | |
| 2013 | 1795 | 
                                    
                                    0.8%
                                 | |
| 2014 | 2504 | 
                                    
                                    1.2%
                                 | |
| 2015 | 2631 | 
                                    
                                    1.2%
                                 | |
| 2016 | 2622 | 
                                    
                                    1.2%
                                 | |
| 2017 | 3850 | 
                                    
                                    1.8%
                                 | |
| 2018 | 3918 | 
                                    
                                    1.8%
                                 | |
| 2019 | 4375 | 
                                    
                                    2%
                                 | |
| NA | 171127 | 
                                    
                                    79.1%
                                 |