Year current US$ 1970 489999.95738268155 1971 779999.9639391897 1972 300000.0007450585 1973 2069999.9500066019 1974 2900000.050663947 1975 259999.9979138372 1976 1380000.0157207253 1977 29209999.82394277 1978 3160000.059753656 1979 4429999.94754791 1980 3839999.938383697 1981 41889999.42503871 1982 7429999.949410555 1983 8580000.083893538 1984 5459999.980404969 1985 8189999.923110009 1986 6350000.012665987 1987 10759999.740868803 1988 22550000.25592745 1989 24329999.903216954 1990 36469999.52383338 1991 21079999.970272176 1992 25930000.016465798 1993 22700000.263750553 1994 19660000.097006574 1995 32399999.743327472 1996 31710000.181570634 1997 30170000.1452118 1998 37860000.31605364 1999 35109999.99009071 2000 48750000.95739962 2001 175850003.4976747 2002 78940000.76502565 2003 55170000.35010278 2004 115709999.66003 2005 870969982.9649178 2006 729649993.6990436 2007 869020006.8168344 2008 771960008.5038694 2009 94879998.54981905 2010 203709999.22789595 2011 74449999.08842148 2012 64679999.340325564 2013 99409998.22504811 2014 171499996.4721499 2015 56099999.35887748 2016 69050000.60983004 2017 93450000.21718445 2018 90090001.04665756 2019 94179999.48374929 2020 99159999.08745272 2021 136389999.98942024 2022 163739996.19297683