| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 3 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    |
| 2004 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 2005 | 2 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 2006 | 2 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 2007 | 3 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    |
| 2008 | 3 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    |
| 2009 | 6 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    |
| 2010 | 6 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    |
| 2011 | 9 | 
                                                                 
                                    
                                    12.3%
                                 
                                                             | 
                                                        
                    |
| 2012 | 8 | 
                                                                 
                                    
                                    11%
                                 
                                                             | 
                                                        
                    |
| 2013 | 10 | 
                                                                 
                                    
                                    13.7%
                                 
                                                             | 
                                                        
                    |
| 2014 | 9 | 
                                                                 
                                    
                                    12.3%
                                 
                                                             | 
                                                        
                    |
| 2015 | 11 | 
                                                                 
                                    
                                    15.1%
                                 
                                                             | 
                                                        
                    |
| 9997 | Inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6408 |