| | | | | | 1965 12 | | 1987 8 1990 12 | | 1987 8 1991 4 | | 1991 4 1996 10 | | 1996 10 1997 12 | | | 1997 12 2000 2 | | 2000 2 2001 9 | | 2001 9 2003 10 | | 2003 10 2006 9 | | 2006 9 2010 11 | | | 2010 11 2012 3 | | | 2012 3 2013 5 | | 2013 1 2015 5 | | 2015 5 2017 6 | | 2017 6 2018 4 | | 2018 4 | | | |