| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1972- | 8 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    
| 1 | 1993- | 10 | 
                                                                 
                                    
                                    25.6%
                                 
                                                             | 
                                                        
                    
| 2 | 2002- | 8 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    
| 3 | 2007- | 13 | 
                                                                 
                                    
                                    33.3%
                                 
                                                             | 
                                                        
                    
| 4 | 2010- | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1 |