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	72412349930.24548
1991	76589869662.05576
1992	67982120306.82345
1993	63315059977.18315
1994	66679020122.617516
1995	60726050328.27333
1996	54110829968.08739
1997	51074559903.56209
1998	55264659924.507164
1999	57629609455.10869
2000	56632050241.47037
2001	63431569958.68685
2002	68338199869.63276
2003	70824120264.5861
2004	71981030284.73264
2005	97157789358.61594
2006	89093639946.22232
2007	79832739674.09134
2008	83688390361.78592
2009	85824220097.78026
2010	86653979822.15886
2011	88361259908.67618
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	123530651131.5592