| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2015 | 272 | 
                                    
                                    3.4%
                                 | 
| 2 | 2014 | 893 | 
                                    
                                    11.3%
                                 | 
| 3 | 2013 | 1247 | 
                                    
                                    15.8%
                                 | 
| 4 | 2012 | 1106 | 
                                    
                                    14%
                                 | 
| 5 | 2011 | 499 | 
                                    
                                    6.3%
                                 | 
| 6 | 2010 | 617 | 
                                    
                                    7.8%
                                 | 
| 7 | 2009 | 386 | 
                                    
                                    4.9%
                                 | 
| 8 | 2008 | 554 | 
                                    
                                    7%
                                 | 
| 9 | 2007 or earlier | 2318 | 
                                    
                                    29.4%
                                 | 
| Sysmiss | 17692 |