| | 1969 | | 1972 1978 | | 1975 1979 | | 1980 | | 1981 11 1983 8 | | | 1983 8 1990 8 | | | | 1990 8 1993 8 | | | | 1993 8 1995 8 | | 10 | 2 | 1995 8 1996 8 | | | 1996 10 1999 10 | | | 1999 10 2002 3 | | | 2002 3 2003 10 | | | 2003 10 | | | | | |