| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1994 | 2 | 
                                    
                                    0.3%
                                 | 
| 2 | 2001 | 1 | 
                                    
                                    0.2%
                                 | 
| 3 | 2010 | 3 | 
                                    
                                    0.5%
                                 | 
| 4 | 2011 | 11 | 
                                    
                                    1.9%
                                 | 
| 5 | 2012 | 77 | 
                                    
                                    13%
                                 | 
| 6 | 2013 | 160 | 
                                    
                                    27%
                                 | 
| 7 | 2014 | 30 | 
                                    
                                    5.1%
                                 | 
| 8 | 2015 | 5 | 
                                    
                                    0.8%
                                 | 
| 9 | 2016 | 3 | 
                                    
                                    0.5%
                                 | 
| 10 | 2018 | 2 | 
                                    
                                    0.3%
                                 | 
| 11 | 2019 | 2 | 
                                    
                                    0.3%
                                 | 
| Missing value | 297 | 
                                    
                                    50.1%
                                 |