Year current US$ 1971 9999.99977648258 1972 180000.00715255702 1973 9999.99977648258 1974 230000.004172325 1975 160000.0001490121 1976 49999.99888241288 1977 400000.00409781944 1978 369999.99172985594 1979 370000.0103563071 1980 2539999.917149543 1981 1180000.0052899118 1982 770000.0274926419 1983 939999.9845772979 1984 3849999.882280831 1985 1539999.99165535 1986 1829999.9535083727 1987 2210000.0660866476 1988 2139999.9205023074 1989 2409999.916329979 1990 19499999.98696148 1991 31869999.520480685 1992 25849999.371916052 1993 24100000.374019157 1994 162080001.62430093 1995 158869996.13605484 1996 132179995.7733601 1997 69699998.42718248 1998 62599999.39054257 1999 46870000.7908046 2000 36800000.49807136 2001 42339999.4391948 2002 41510000.29779976 2003 51220000.20183623 2004 56069998.91623856 2005 40280000.42773785 2006 41080000.05781648 2007 48840001.48624183 2008 56809999.9204278 2009 41810000.25570393 2010 50079998.798668385 2011 42350000.053644106 2012 39210000.485181764 2013 32189999.580383327 2014 40239999.18997283 2015 34110000.47624111 2016 39000000.36694111 2017 50490000.48637396 2018 55570001.48296356 2019 36069998.808205105 2020 52640000.10490413 2021 48879999.05645852 2022 100919997.20036986