| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1979 | 1 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 2005 | 21 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| 2006 | 85 | 
                                                                 
                                    
                                    42.5%
                                 
                                                             | 
                                                        
                    |
| 2007 | 6 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 2009 | 3 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2010 | 72 | 
                                                                 
                                    
                                    36%
                                 
                                                             | 
                                                        
                    |
| 2011 | 12 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 10 |