Year	constant 2021 US$
1970	7278250041.738158
1971	7038109875.202179
1972	7146699964.158239
1973	6250390114.277602
1974	8385759912.133221
1975	7242059950.94776
1976	6350289980.083706
1977	8356570134.907968
1978	7927229852.586987
1979	7504499945.059419
1980	9112120104.379951
1981	11210599964.410072
1982	10088959957.480438
1983	9380910062.07467
1984	9729769960.284245
1985	11346119709.61094
1986	9206039968.72902
1987	9179829972.74399
1988	9280300083.875662
1989	9888130009.17435
1990	14464539947.509777
1991	17188499954.37265
1992	16220809944.868092
1993	16960750002.026571
1994	17618820217.251778
1995	18541340190.649033
1996	14724529963.016521
1997	13798879990.04126
1998	16788989832.073456
1999	19659519792.07995
2000	19100250083.2081
2001	18726410100.221645
2002	19004569758.77286
2003	17267260143.041626
2004	17967430114.209663
2005	11525969974.994665
2006	12723640027.0462
2007	12281340018.749237
2008	12857110055.923481
2009	13313469939.231874
2010	11527119979.858406
2011	12455039924.621586
2012	14171119960.784924
2013	12547570069.31305
2014	13885930238.723757
2015	13448329878.807077
2016	13009390030.86091
2017	13395019994.735716
2018	9727219949.722305
2019	8312819998.741158
2020	13236670042.514805
2021	11372130030.561245