Year	constant 2015 US$
1970	21869695224.39634
1971	23745264601.492355
1972	24891011515.002285
1973	25747729524.88366
1974	26006223544.239815
1975	28465428343.5881
1976	29997867066.83002
1977	32619319633.8162
1978	34788325867.95313
1979	35194971792.423615
1980	33418930112.793594
1981	39934238946.92064
1982	43658070179.05556
1983	46096989128.657936
1984	49865783410.64164
1985	49834273050.405304
1986	49917907807.10077
1987	50214618443.02974
1988	51633534958.55541
1989	52262869578.92448
1990	49776514965.50645
1991	44647531310.29748
1992	38435208507.75285
1993	35436046610.16018
1994	36454100557.34553
1995	36724297488.36613
1996	38188756926.40731
1997	39114484210.526306
1998	39639393751.04804
1999	41665166900.906166
2000	42655653639.87184
2001	44215241572.32035
2002	45424961050.526306
2003	48392321347.148735
2004	50185980627.02059
2005	52000200871.19451
2006	59793319160.43936
2007	62428364832.95195
2008	62247256530.89245
2009	62986416842.105255
2010	66687478077.80319
2011	67038123386.727684
2012	68344277162.47139
2013	70888208878.71854
2014	72885133913.04347
2015	76616000000
2016	78818052540.04576
2017	80250438627.00227
2018	81835355423.34094
2019	82236844302.05948
2020	74759333089.24484
2021	76563403203.66132
2022	77999295743.70708