| | | | 1957 11 | | 1976 8 1985 9 | | 1976 8 1979 12 | | | 1979 12 1983 8 | | 1983 8 1989 1 | | 1989 1 1990 8 | | | 1990 8 1990 9 | | 1990 9 1992 8 | | | 1992 8 1994 8 | | 1994 8 1996 7 | | | 1996 7 2003 9 | | 2003 9 2005 11 | | 2005 11 2007 12 | | | 2007 12 2018 3 | | | |