Year	constant 2015 US$
1970	23120654813.226868
1971	25105299224.961365
1972	26317053148.530323
1973	27220909321.8834
1974	27488896946.333027
1975	30093861942.67968
1976	31727344869.416035
1977	34490638878.70509
1978	36765640923.64332
1979	37165718488.94898
1980	35363388173.54068
1981	42325850268.88738
1982	46100569046.77152
1983	48595287844.258766
1984	52448756410.021774
1985	53286192380.628746
1986	53336975926.04973
1987	52055729737.86221
1988	53984675578.2487
1989	54351816305.328995
1990	52749217702.76086
1991	47108903626.70747
1992	41653408481.76058
1993	35456139102.31798
1994	35710334910.44604
1995	36587809678.546646
1996	39455836535.564896
1997	40554060177.15931
1998	40618600362.11017
1999	43132386147.588715
2000	45683563278.5995
2001	47138598430.46162
2002	47810239203.23084
2003	49623557376.22501
2004	52487103646.415344
2005	58366528733.14571
2006	65408954114.94661
2007	70159041951.11572
2008	73047369063.91
2009	74107509498.14774
2010	75878940053.32103
2011	78005296225.14456
2012	80357078126.46217
2013	82564971264.27292
2014	83429902609.35301
2015	87132800000
2016	87579654548.89073
2017	89164663930.97015
2018	91169039692.7712
2019	91020354637.14745
2020	81054459000.25871
2021	82070633423.42491
2022	83527267339.32599