Year	current US$
1970	3211459954.7386174
1971	3577440027.4306526
1972	3559670043.3678927
1973	5456259986.747056
1974	7524590045.690535
1975	10703029906.272896
1976	10909079931.974415
1977	10322779876.291754
1978	11826199945.241215
1979	14513709958.076488
1980	17165419961.452482
1981	15282969951.629646
1982	14552219978.92857
1983	14107099945.07768
1984	13994999941.825876
1985	14763110017.776495
1986	16953119836.807255
1987	17478590108.871464
1988	17906280151.128773
1989	17853330005.88418
1990	26022280222.892765
1991	28261119792.908443
1992	25219759895.324726
1993	21425019969.940186
1994	23588929959.53562
1995	20681529900.550842
1996	21697359842.777264
1997	16636600012.660027
1998	17876419871.330273
1999	18050880010.604866
2000	16429480071.067814
2001	19197630076.408386
2002	19092590004.920975
2003	20175590058.32673
2004	20401720005.03542
2005	23587419960.975662
2006	23083769884.58635
2007	24696609859.46655
2008	30483030059.81447
2009	32462440265.655544
2010	34977840034.00805
2011	37706159850.12057
2012	36020020087.24214
2013	48296170206.06998
2014	46261430172.92025
2015	45448790090.560936
2016	51014930726.051384
2017	53245169416.78526
2018	58034579896.9269
2019	53835359948.158295
2020	63352999917.984055
2021	66938980470.65739