Year	current US$
1970	39779114.5401895
1971	51757493.7417462
1972	41410356.2122981
1973	58404390.442667
1974	344339062.374493
1975	420435707.620473
1976	487877591.488652
1977	605361501.851765
1978	628789926.203622
1979	1666532175.12793
1980	132070722.393885
1981	80379188.4863689
1982	52926108.7876153
1983	94697955.1910291
1984	112717362.219614
1985	259580963.486838
1986	193564200.532993
1987	246296211.657082
1988	210548919.039156
1989	359460767.148997
1990	573778934.832942
1991	344809319.703976
1992	352808680.570196
1993	281980101.43224
1994	330681394.972765
1995	428577865.24233
1996	521148836.031869
1997	483676998.166165
1998	376840952.775042
1999	583000999.236428
2000	987088339.667305
2001	952939661.311607
2002	1110360051.10617
2003	1314626727.36696
2004	1812234197.83836
2005	2421182296.4123
2006	2571755414.90796
2007	2234153565.5194
2008	2621127083.81754
2009	2048954970.33463
2010	2547782379.11748
2011	3711776759.68696
2012	4102001267.22338
2013	3683268559.28971
2014	3536493918.62994
2015	2230950152.56145
2016	1917487297.0375
2017	2542106056.26503
2018	3193722054.82834
2019	2881011052.35117
2020	2139053464.22309
2021	3144599835.21364