Year	current US$
1970	542780003.0708311
1971	602020000.0852349
1972	610400006.2942505
1973	781199999.8185782
1974	1159600009.9182124
1975	1441460011.24382
1976	1382409999.7580056
1977	1509669982.7313406
1978	2107920005.6195278
1979	2460689999.5803833
1980	2706670009.6130376
1981	2649729988.098146
1982	2614319970.130921
1983	2482990002.63214
1984	2834980006.217957
1985	2929300014.49585
1986	4007109979.6295176
1987	4334899929.04663
1988	5026420055.389405
1989	5882469989.776612
1990	6473519947.052003
1991	6558540054.321289
1992	6609010009.765627
1993	6321599979.400638
1994	7606889926.910406
1995	6911829978.942873
1996	6707550060.272219
1997	5283050033.569337
1998	5644260025.024416
1999	4772110036.849977
2000	4049070066.452026
2001	4705749979.972841
2002	6247569955.825806
2003	6514859987.258913
2004	8213159975.051883
2005	14364720142.36451
2006	20366009918.2129
2007	12652500106.811527
2008	12531550003.051765
2009	14215949983.596819
2010	15345270011.901863
2011	14186749874.114998
2012	15529890200.614933
2013	14105610011.100773
2014	14729140147.686
2015	14652700120.925909
2016	13834239950.180054
2017	15917469878.673563
2018	16573919943.332672
2019	18431019996.643078