Year	current US$
1970	121231337.160537
1971	130476520.263739
1972	137618764.751703
1973	168204695.717933
1974	210919499.526638
1975	249084532.570976
1976	300006003.816747
1977	375219947.708245
1978	429584478.262923
1979	495936082.043979
1980	564295393.277784
1981	605165580.448868
1982	635233664.835049
1983	664394558.817753
1984	677163986.813988
1985	705830271.240232
1986	498579222.862358
1987	477380967.160461
1988	538283387.577454
1989	553375711.014789
1990	494409039.351377
1991	589071333.285993
1992	662747799.835049
1993	733999017.208853
1994	862231529.682219
1995	975664931.187078
1996	1091283705.54167
1997	1265620770.89713
1998	1432392744.14485
1999	1438675866.7853
2000	1608242109.75183
2001	1580915098.2211
2002	1836357604.25439
2003	2040533234.68544
2004	2333433471.18567
2005	2763464123.68819
2006	3167255793.53555
2007	3675146284.17929
2008	4410934963.10479
2009	4404470764.20155
2010	4834819629.15547
2011	5447979205.77391
2012	5713975370.58259
2013	6252522939.81481
2014	6590151798.96434
2015	6860216008.32677
2016	7995629148.608
2017	9001424870.23368
2018	8800467263.15646
2019	9036600266.39607
2020	8987730722.88832
2021	9842549569.05508