Year	constant 2010 US$
1975	3714940888.94335
1976	4466438228.00072
1977	5264274034.38341
1978	5665610906.72244
1979	6198842970.68514
1980	6571847555.84412
1981	6717355834.54483
1982	7113898770.90367
1983	7420966913.92264
1984	8088609472.98733
1985	8496810637.64795
1986	8796433464.98462
1987	9533473288.60723
1988	10355551856.9097
1989	11212187395.6984
1990	12043147202.7304
1991	12130227470.6712
1992	13222139306.8067
1993	13325950891.0956
1994	14071367731.9096
1995	14345329344.1316
1996	14556638047.6943
1997	14841445973.9787
1998	17146086318.1966
1999	16477932263.5679
2000	16937430686.0921
2001	17867256386.3703
2002	18946874303.3712
2003	19648568483.3023
2004	20289981107.7457
2005	21391591580.8898
2006	22326355986.8647
2007	23243172152.0177
2008	25215253791.4829
2009	23995295734.134
2010	24784569536.4238
2011	25628638284.2184
2012	24116914437.1365
2013	22501442574.1063
2014	22395554605.2557
2015	23923695345.0896
2016	24266813893.5305
2017	25166048901.4853
2018	26138721674.0936