| | | | | | | 1967 12 | | 1991 12 1987 8 | | | 1983 9 1987 7 | | 1987 7 1987 8 | 1987 8 1989 9 | | 1989 9 1993 7 | | 1993 7 1998 8 | | 1998 8 2001 7 | | 2001 7 2002 8 | 2002 8 2003 4 | | 2003 4 2004 4 | | 2004 4 2009 12 | | 2009 12 2010 8 | | 2010 8 2016 5 | | 2016 5 2020 10 | | 2020 10 | | |