| | | | | 1964 12 | 1987 | 6 1988 7 | | | 1988 7 1989 12 | | 1989 12 1995 7 | | 1995 7 1997 12 | | 1997 12 2001 4 | | | 2001 4 2001 6 | | | 2001 6 2005 6 | | | 2005 6 2009 10 | | | 2009 10 2010 2 | | | 2010 2 2010 7 | 2010 7 2011 8 | | | 2011 8 2013 5 | | | 2013 5 2015 8 | | | | 2015 8 2018 11 | | | 2018 11 2020 3 | | | 2020 3 | | |