Year	constant 2010 US$
1973	7688253798.71782
1974	7961650888.75828
1975	7611707238.31255
1976	11054686267.1091
1977	12769075307.6522
1978	14448827900.4076
1979	15761664984.08
1980	17894231480.438
1981	19575254069.8616
1982	17863635951.3732
1983	16586012592.7714
1984	18104243856.449
1985	17150702257.3369
1986	19112857403.4264
1987	22262119306.4641
1988	24633561887.1775
1989	23456846076.8065
1990	25762941216.3087
1991	27783285600.6905
1992	30580987491.5294
1993	30745279736.2973
1994	38380886126.3873
1995	44330505371.3637
1996	43009009173.159
1997	48996266697.4527
1998	40941905572.4961
1999	34768303921.6155
2000	41545734426.6965
2001	39657470390.8619
2002	39829959930.6599
2003	40902766389.8149
2004	41960332795.6378
2005	41652183802.7974
2006	45158662998.1041
2007	48765357015.0063
2008	48614457519.8665
2009	49151668925.1536
2010	54622612366.7817
2011	55881301115.3627
2012	57707565905.3701
2013	61233903357.095
2014	62167586708.0843
2015	57492704446.348
2016	60269479837.9793
2017	63407939784.9994
2018	64236941465.9933