Year	constant 2010 US$
1964	24805452016.215
1965	26826279094.6209
1966	28612158214.8714
1967	29838049546.7819
1968	31261618310.8813
1969	34158924012.0998
1970	36798203047.8284
1971	39272417016.3333
1972	41057012102.7669
1973	42984943199.4367
1974	43899150372.9965
1975	43424765312.4961
1976	39453829833.1343
1977	45897467107.2322
1978	47804868117.5519
1979	50518980442.1415
1980	51557141387.9651
1981	52049940301.6956
1982	50287364931.8125
1983	48614840596.1379
1984	50023351314.9701
1985	51329170419.3457
1986	52385627687.3532
1987	54350271459.7322
1988	56341230093.283
1989	59449532839.9405
1990	54895381096.8665
1991	56533682487.5269
1992	56390823102.0689
1993	58618998738.4549
1994	59816073557.9089
1995	66140800219.5465
1996	62614444739.3232
1997	66038623555.9431
1998	64408744227.0056
1999	69919904711.79
2000	73336366027.4042
2001	69830097331.996
2002	68101559047.0164
2003	67038528327.8706
2004	76005896371.3799
2005	74278033109.9104
2006	74191333609.3416
2007	75355024639.3479
2008	71535888421.9526
2009	67068953551.2918
2010	64294600000
2011	63414829680.8594
2012	66992920477.9087
2013	67118882109.3685
2014	66012068342.8452
2015	64671402457.4212
2016	64559475042.4015
2017	61441204214.6044
2018	57448998057.9984