| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2003 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2004 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2005 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2007 | 2 | 
                                                                 
                                    
                                    6.3%
                                 
                                                             | 
                                                        
                    |
| 2008 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2010 | 2 | 
                                                                 
                                    
                                    6.3%
                                 
                                                             | 
                                                        
                    |
| 2011 | 4 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 2012 | 1 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2013 | 7 | 
                                                                 
                                    
                                    21.9%
                                 
                                                             | 
                                                        
                    |
| 2014 | 8 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    |
| 2015 | 3 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    |
| 9997 | Inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6449 |