     
                                
                                   1958       9 10                                                                                                                       1970                      1989                      1998       1989                 1989           8                                                            1991                              1998                                       
      2007                                              2008           2012                                    2008  9                   2009  8              2010  7               2012  2                   2012  7          

             2013  1                         
   2013  8            2014  6                 2015  1                   2015  7                         
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