Year	constant 2010 US$
1970	17947995402.7466
1971	19487235442.7365
1972	20427525653.0219
1973	21130615968.5206
1974	21342756532.1379
1975	23360973795.211
1976	24618613778.9814
1977	26769984345.9243
1978	28550041796.3596
1979	28883767488.794
1980	27426207720.8039
1981	32773183606.3733
1982	35829252982.8851
1983	37830822078.4627
1984	40923791675.7221
1985	40897931791.7042
1986	40966569063.4094
1987	41210073195.3834
1988	42374547909.4486
1989	42891029495.7522
1990	40850530955.0281
1991	36641282764.2164
1992	31542961093.3354
1993	29081612483.0034
1994	29917107782.5933
1995	30138852677.7979
1996	31340703438.8384
1997	32100428267.2135
1998	32531210356.4855
1999	34193719481.7474
2000	35006590909.9147
2001	36286511711.089
2002	37279302907.5963
2003	39714552595.1701
2004	41186570802.5615
2005	42675462847.0045
2006	49071109874.3253
2007	51233636020.1909
2008	51085004274.7851
2009	51691617477.7191
2010	54729000000
2011	55016767174.0674
2012	56088699897.4683
2013	58176450745.3269
2014	59815284801.6405
2015	62877127533.7172
2016	64684305386.8602
2017	65704440018.9289