Year	current US$
1960	556900000
1961	601500000
1962	520600000
1963	520000000
1964	668900000
1965	855300000
1966	933600000
1967	1123900000
1968	1393000000
1969	1384400000
1973	3379000000
1974	5425800000
1975	10345900000
1976	12886700000
1977	14641600000
1978	10372000000
1979	9695000000
1980	10849000000
1981	13515000000
1982	11845000000
1983	18103000000
1984	14494000000
1985	11408000000
1986	9355000000
1987	9369000000
1988	8171000000
1989	12807000000
1990	18721600000
1991	29677500000
1992	29870000000
1993	20037000000
1994	11795000000
1995	12313000000
1996	15117000000
1997	15907800000
1998	14323000000
1999	12683000000
2000	14428150460
2001	16684080752.999998
2002	20682088073
2003	26297665721
2004	33270671630.999996
2005	39265637524
2006	41062327970
2007	45513287271
2008	58794964562
2009	50155760456
2010	66838096090.00001
2011	61946201903
2012	59729311722
2013	48911545375
2014	52918645995
2015	40455177824
2016	43185370605
2017	52182016378
2018	41802114321
2019	26714452733
2020	21304841466