| Value | Category | Cases | |
|---|---|---|---|
| 99 | Don't Know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1989 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 1994 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2002 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2005 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2006 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2007 | 3 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    |
| 2008 | 2 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 2009 | 11 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 2010 | 2 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 2011 | 3 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    |
| 2012 | 2 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 2013 | 8 | 
                                                                 
                                    
                                    12.1%
                                 
                                                             | 
                                                        
                    |
| 2014 | 3 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    |
| 2015 | 6 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 2016 | 4 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    |
| 2017 | 6 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 2018 | 3 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    |
| 2019 | 8 | 
                                                                 
                                    
                                    12.1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 6285 |