| | | | | 1968 10 | 1990 8 | 1992 10 | | 1986 9 1990 7 | | 1990 7 1990 8 ; | 1990 8 1997 2 | | | 1997 2 2002 2 | | | 2002 2 2004 5 | | | 2004 5 2008 1 | | | 2005 3 2008 1 | | | 2008 1 2009 11 | | | | 2009 11 2010 12 | | | | | 2010 12 2016 6 | | | 2016 6 | | | | |