Year current US$ 1970 39999.9991059303 1971 300000.011920929 1972 50000.0007450581 1973 59999.9986588955 1974 460000.00834465 1975 280000.001192093 1976 1110000.01430511 1977 1350000.02384186 1978 1899999.97615814 1979 2799999.95231628 1980 3380000.1144409203 1981 4210000.03814697 1982 2740000.00953674 1983 3259999.99046326 1984 1919999.95708466 1985 2099999.90463257 1986 4619999.88555908 1987 5389999.8664856 1988 4329999.92370605 1989 3859999.89509583 1990 4360000.1335144 1991 1929999.94754791 1992 3619999.8855590797 1993 3369999.8855590797 1994 5409999.84741211 1995 3549999.95231628 1996 4230000.01907349 1997 4500000 1998 4559999.94277954 1999 289999.99165535 2000 109999.999403954 2001 2799999.95231628 2002 1850000.02384186 2003 639999.985694885 2004 1179999.94754791 2005 1029999.97138977 2006 610000.014305115 2007 100000.00149011599 2014 170000.00178813902 2015 0