| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 6 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 2004 | 5 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 2005 | 4 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 2008 | 5 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 2009 | 11 | 
                                                                 
                                    
                                    9.6%
                                 
                                                             | 
                                                        
                    |
| 2010 | 6 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 2011 | 7 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    |
| 2012 | 9 | 
                                                                 
                                    
                                    7.8%
                                 
                                                             | 
                                                        
                    |
| 2013 | 14 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    |
| 2014 | 7 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    |
| 9998 | dont know | 41 | 
                                                                 
                                    
                                    35.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 16315 |