2000 1995 1990 1985 1980 1975 . 1999 1994 1989 1984 1979 1974 . 1998 1993 1988 1983 1978 1973 2002 1997 1992 1987 1982 1977 1972 2001 1996 1991 1986 1981 1976 1971