| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 2 | 
                                    
                                    0.1%
                                 | |
| 2001 | 1 | 
                                    
                                    0%
                                 | |
| 2003 | 1 | 
                                    
                                    0%
                                 | |
| 2005 | 1 | 
                                    
                                    0%
                                 | |
| 2006 | 2 | 
                                    
                                    0.1%
                                 | |
| 2007 | 2 | 
                                    
                                    0.1%
                                 | |
| 2008 | 2 | 
                                    
                                    0.1%
                                 | |
| 2009 | 1 | 
                                    
                                    0%
                                 | |
| 2010 | 15 | 
                                    
                                    0.6%
                                 | |
| 2011 | 22 | 
                                    
                                    0.9%
                                 | |
| 2012 | 65 | 
                                    
                                    2.5%
                                 | |
| 2013 | 854 | 
                                    
                                    33.4%
                                 | |
| 2014 | 978 | 
                                    
                                    38.3%
                                 | |
| 2015 | 608 | 
                                    
                                    23.8%
                                 | |
| 9999 | 9999. MISSING | 48 | |
| Sysmiss | 29537 |