Year	constant 2015 US$
1970	12424865155357.037
1971	12839185013060.162
1972	13530284788975.588
1973	14297893891243.217
1974	13972647226704.262
1975	14017901270559.656
1976	14674701872429.701
1977	15162351689348.162
1978	15886164384626.043
1979	16118690641211.898
1980	15964487221725.17
1981	16244611950851.762
1982	16450432893719.1
1983	16912693748532.21
1984	17796388701396.098
1985	18482897741800.39
1986	19302523934587.11
1987	20014342498254.44
1988	21118304901465.996
1989	21767180286028.047
1990	22314382704218.617
1991	22605442076533.402
1992	23071428798470.906
1993	23265612983791.277
1994	24135973689122.938
1995	24905461839357.383
1996	25688476086929.13
1997	26657780391938.254
1998	27607420166253.617
1999	28479725818241.414
2000	29466300598248.293
2001	29953183025921.01
2002	30356154036467.605
2003	30912267538690.285
2004	31945468261443.188
2005	32688060536361.527
2006	33688623053692.44
2007	34201821226748.55
2008	33453461850106.61
2009	32549650876731.766
2010	33825570921581.16
2011	34296129282835.156
2012	34883967311775.535
2013	35348514042125.81
2014	36229863633908.81
2015	37334021815427.86
2016	37949600503455.484
2017	38938343181408.516
2018	39699441135404.08
2019	40313920793430.48
2020	38325229016388.47
2021	40158777325092.25