Year	current US$
1970	2719791060.32022
1971	2866919256.3483
1972	3029279479.74419
1973	4156001280.84589
1974	6006241741.764
1975	5476816382.46659
1976	6490062440.56813
1977	7609493817.16097
1978	10093081154.2696
1979	10942090969.5367
1980	12975183354.1876
1981	15593051502.9236
1982	14701863077.8835
1983	16588656846.2208
1984	21124693340.2329
1985	18678670584.8779
1986	15527889724.5041
1987	16884762775.4853
1988	20191165535.8316
1989	21319167171.4886
1990	25665838455.5987
1991	30741686706.9097
1992	37114434786.1772
1993	43589724186.55
1994	49523892356.7819
1995	59744581398.0091
1996	68195321427.8492
1997	67721307181.217
1998	46120255061.2789
1999	50296614557.1299
2000	59587462022.3312
2001	60833395932.9917
2002	68303808636.6136
2003	74089243906.7844
2004	86090970255.4756
2005	98936794493.5974
2006	114182993148.331
2007	139548674387.443
2008	163564554299.821
2009	147712567033.519
2010	183598322986.189
2011	219226912176.237
2012	228451636960.266
2013	235906371308.3
2014	242251060534.287
2015	219218282039.881
2016	220149854565.745
2017	229287141997.749
2018	252387046505.593
2019	262142361843.096
2020	248136926812.025
2021	264144293995.078