Year	current US$
1970	4269082543.52912
1971	4936724015.19911
1972	6119611202.09494
1973	7173712548.71726
1974	7510455740.79864
1975	9097905328.33399
1976	8934850069.75124
1977	10455870926.4921
1978	13236180053.8285
1979	16403227056.64
1980	19197613998.7901
1981	18309627503.8767
1982	18481102502.1909
1983	17595537051.3514
1984	16744513914.55
1985	17491735974.0788
1986	23839988098.2068
1987	28172766992.4438
1988	31045179385.0599
1989	31776992554.5698
1990	40451926020.2009
1991	40808787716.9007
1992	45229742610.492
1993	42609829196.3167
1994	46426765177.2061
1995	55230519839.8541
1996	60993336390.1828
1997	65663361833.7435
1998	70928313482.0278
1999	75042447159.3895
2000	75836925760.3668
2001	80795971254.1284
2002	93018269848.8153
2003	122139040673.485
2004	143351404720.34
2005	155283933483.426
2006	169755791729.168
2007	195714357038.852
2008	200535805158.246
2009	163845589521.274
2010	154694129321.621
2011	161180590036.595
2012	149727402517.539
2013	165765454556.402
2014	180441274718.696
2015	160914274683.976
2016	171109211479.674
2017	183132517404.038
2018	202715439148.446
2019	208708508843.772
2020	199284364917.113
2021	249681049442.11