Year	constant 2010 US$
1960	3253674447.29126
1961	3654311048.05764
1962	4074056427.68035
1963	3949039671.09518
1964	4062720711.40965
1965	4624324483.21964
1966	5420739520.63646
1967	5172001517.89707
1968	4052032750.35445
1969	4271297890.79007
1970	4649263059.01512
1971	5343656649.99587
1972	5033705779.39484
1973	7444974568.97116
1974	9935593372.44217
1975	9738999664.54788
1976	8444460866.43689
1977	7415177829.05964
1978	6879808143.47611
1979	8030545283.7534
1980	10982689678.2447
1981	13184017500.5915
1982	12686540951.6293
1983	8965779882.76242
1984	8643016463.59748
1985	7350795388.74435
1986	8847586806.9182
1987	10253796936.7169
1988	8665545035.77382
1989	7548595123.30151
1990	7612218051.31322
1991	7754646577.63386
1992	7870133784.31838
1993	8777408367.00012
1994	11991298968.6243
1995	14553440569.8821
1996	14139947501.9985
1997	16296894761.866
1998	16104941609.934
1999	14324323555.8279
2000	13586097712.1195
2001	12484892787.878
2002	12546231201.0894
2003	13250901324.6292
2004	14226903723.0805
2005	15809434783.9334
2006	18792646551.1773
2007	23053140569.9989
2008	29466252078.3436
2009	28463188615.2403
2010	34689037556.1927
2011	38133369865.1079
2012	43811142043.3071
2013	46167619553.2092
2014	45238883814.3502
2015	42000576410.9861
2016	40131919693.2119
2017	40518351696.4435
2018	42325670001.0062