Year	constant 2010 US$
1964	15072178842.7612
1965	16880591097.9266
1966	18030237002.1528
1967	18657434371.2479
1968	20187575100.0493
1969	22098089902.7451
1970	24860316837.0188
1971	26349615688.7228
1972	29050986746.5889
1973	30454746591.7659
1974	28647688032.2597
1975	29013569855.7074
1976	48521243371.2815
1977	30827737843.127
1978	32435839236.6637
1979	33175821220.3326
1980	33680243909.8558
1981	33208614474.4867
1982	31407391286.0757
1983	32552353574.4404
1984	35390145761.644
1985	36601372684.0929
1986	37702526156.7451
1987	41101696467.8571
1988	43799122198.402
1989	45449784885.8056
1990	46571494426.4517
1991	45627336834.7943
1992	47238929494.0865
1993	49517152836.5639
1994	51633092716.2036
1995	48833060195.8477
1996	57868597200.3412
1997	61872844411.9865
1998	63676272909.1216
1999	69734220636.876
2000	70602147600.3459
2001	71493012471.7372
2002	72364757378.1042
2003	74462588543.0217
2004	79806452375.7412
2005	81253627142.4036
2006	81738383599.9284
2007	81913296591.7951
2008	79737709865.799
2009	76965528257.7984
2010	76637800000
2011	77997693089.2557
2012	80085321390.1773
2013	79939243994.7481
2014	78277118317.9635
2015	75605957555.2577
2016	72914559337.8144
2017	72724513607.4683
2018	73848750722.7921