| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 10 | 
                                    
                                    8.1%
                                 | |
| 1994 | 2 | 
                                    
                                    1.6%
                                 | |
| 1997 | 2 | 
                                    
                                    1.6%
                                 | |
| 1998 | 2 | 
                                    
                                    1.6%
                                 | |
| 2000 | 5 | 
                                    
                                    4.1%
                                 | |
| 2001 | 2 | 
                                    
                                    1.6%
                                 | |
| 2004 | 4 | 
                                    
                                    3.3%
                                 | |
| 2009 | 1 | 
                                    
                                    0.8%
                                 | |
| 2011 | 32 | 
                                    
                                    26%
                                 | |
| 2012 | 9 | 
                                    
                                    7.3%
                                 | |
| 2013 | 10 | 
                                    
                                    8.1%
                                 | |
| 2014 | 6 | 
                                    
                                    4.9%
                                 | |
| 2015 | 9 | 
                                    
                                    7.3%
                                 | |
| 2016 | 2 | 
                                    
                                    1.6%
                                 | |
| 2017 | 1 | 
                                    
                                    0.8%
                                 | |
| 2018 | 4 | 
                                    
                                    3.3%
                                 | |
| 2019 | 1 | 
                                    
                                    0.8%
                                 | |
| 2020 | 5 | 
                                    
                                    4.1%
                                 | |
| 2021 | 3 | 
                                    
                                    2.4%
                                 | |
| 2022 | 4 | 
                                    
                                    3.3%
                                 | |
| Missing value | 9 | 
                                    
                                    7.3%
                                 |