| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 3 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 2001 | 6 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 2002 | 4 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 2003 | 3 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 2004 | 7 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2005 | 13 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 2006 | 10 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 2007 | 11 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 2008 | 22 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 2009 | 24 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 2010 | 58 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 2011 | 57 | 
                                                                 
                                    
                                    12.3%
                                 
                                                             | 
                                                        
                    |
| 2012 | 57 | 
                                                                 
                                    
                                    12.3%
                                 
                                                             | 
                                                        
                    |
| 2013 | 70 | 
                                                                 
                                    
                                    15.1%
                                 
                                                             | 
                                                        
                    |
| 2014 | 70 | 
                                                                 
                                    
                                    15.1%
                                 
                                                             | 
                                                        
                    |
| 2015 | 50 | 
                                                                 
                                    
                                    10.8%
                                 
                                                             | 
                                                        
                    |
| 9997 | inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6016 |