Year	current US$
1971	6933408258.44252
1972	8356031131.45893
1973	11197260365.6679
1974	11997957005.359
1975	10578183939.4737
1976	11050372565.295
1977	12386274999.4789
1978	14846486339.1151
1979	16704447874.8695
1980	18875921019.8573
1981	19863489920.0927
1982	19513408111.8315
1983	19534488464.0421
1984	17090054761.9996
1985	19170442194.3405
1986	24225707362.5302
1987	32148488304.8666
1988	36656004244.2971
1989	35497577101.8049
1990	36516652722.9885
1991	32998584440.2904
1992	32170620231.2282
1993	36115719788.7139
1994	43234617305.2606
1995	50435433217.356
1996	54409010495.7573
1997	52189857734.8256
1998	45148307767.5535
1999	46525155928.3497
2000	41329380564.1493
2001	42900268818.5375
2002	53461795964.4906
2003	71653825226.8362
2004	83365812961.9244
2005	90763026368.772
2006	87386050714.2298
2007	107306275710.51
2008	101672272581.449
2009	96663745364.7381
2010	116166459754.758
2011	135003223430.241
2012	142299682066.102
2013	155860958818.002
2014	164078111206.445
2015	146130565377.57
2016	155711360148.062
2017	169868386457.553
2018	172108502824.896
2019	176367124500.655
2020	175799306703.681
2021	207100908403.858