| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 1991 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 1997 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 1998 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 1999 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2003 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2006 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2008 | 2 | 
                                                                 
                                    
                                    14.3%
                                 
                                                             | 
                                                        
                    |
| 2010 | 2 | 
                                                                 
                                    
                                    14.3%
                                 
                                                             | 
                                                        
                    |
| 2012 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2013 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 2017 | 1 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 121676 |