Year	constant 2021 US$
1970	32750769916.594044
1971	33577219471.1864
1972	31661139899.99892
1973	36849810005.903244
1974	47432449626.24462
1975	55120519629.098495
1976	51487139403.82006
1977	48700510562.09022
1978	50688420074.500175
1979	54243070298.95859
1980	60242690178.58806
1981	60384379815.75356
1982	58494059886.086784
1983	54507419839.00034
1984	56251179430.43264
1985	59476379588.7381
1986	56237610241.39823
1987	54603620418.20589
1988	54129620051.97819
1989	56648819718.707375
1990	69167229998.0708
1991	69863659579.04794
1992	61748830397.46065
1993	57072119928.96537
1994	60434639995.66439
1995	52689800244.34999
1996	49498930008.52317
1997	47434109898.98445
1998	50656329998.970055
1999	51110259532.928505
2000	49831950326.91958
2001	57687589935.30275
2002	63193219925.40363
2003	65809480306.204445
2004	66272360220.760155
2005	97157789358.61594
2006	89093639946.22232
2007	79832739674.09134
2008	83688390361.78592
2009	85824220097.78026
2010	86653979822.15886
2011	88361009908.67618
2012	88841040218.2341
2013	97158319860.69684
2014	95107110142.05219
2015	100971909642.45802
2016	104629350844.14487
2017	110970669470.7275
2018	109025430366.51619
2019	107696129899.02504
2020	133138769937.03847
2021	123528591131.568