Year	constant 2010 US$
1968	53994544654.2772
1969	57084533498.3628
1970	60387276775.7025
1971	64088769505.4955
1972	68972115085.4378
1973	73759531272.7281
1974	78447376334.7786
1975	79520531921.88
1976	83323393460.1511
1977	87368885250.477
1978	94947353607.8264
1979	100505808601.683
1980	104927648652.609
1981	106705637600.547
1982	106473836198.093
1983	107449441295.584
1984	109932473678.525
1985	112598602463.551
1986	118708069637.503
1987	124716375380.92
1988	131186296885.928
1989	133769615133.069
1990	141128668975.103
1991	144743710217.529
1992	151224836055.83
1993	160794604538.962
1994	171820891011.345
1995	180932920548.252
1996	183918903109.716
1997	190100680401.503
1998	192120677864.305
1999	184294670765.713
2000	188648572148.929
2001	191300559369.647
2002	195681259175.884
2003	201912930642.433
2004	212488386147.679
2005	224586037990.677
2006	239491247246.538
2007	254787404815.979
2008	261716457560.605
2009	265969607480.591
2010	275615400141.243
2011	293681736480.746
2012	306632158437.158
2013	321690629234.612
2014	338973558836.953
2015	354954823879.035
2016	363605808502.913
2017	365602801125.217
2018	369263052104.68