Year	current US$
1976	12545979756.159191
1977	15617660606.992567
1978	18866527378.03152
1979	23077747095.385242
1980	29234356887.94752
1981	32777284765.259575
1982	29629760822.14079
1983	22465096751.355816
1984	22895942473.797012
1985	22635566375.110077
1986	24304259902.28337
1987	24718928290.690155
1988	27596459548.593853
1989	29929717767.98055
1990	35822588347.35089
1991	38540121559.78977
1992	44017867233.38969
1993	49775922601.96443
1994	53876493581.974365
1995	57089953831.57462
1996	58657211397.07127
1997	67952239595.5283
1998	70523986467.65346
1999	66797747750.53313
2000	74973659351.16063
2001	74774617216.66402
2002	72240129095.91127
2003	74851176261.76447
2004	85620688437.78716
2005	102092213556.68813
2006	114885889364.99562
2007	140891503536.35132
2008	167922648605.04364
2009	155137625131.4865
2010	191670021727.3797
2011	228770575022.8387
2012	245885447145.93127
2013	261626100825.2969
2014	269265633864.71576
2015	243839276158.1647
2016	233074286164.64865
2017	253940508463.43024
2018	263216480562.06943
2019	257769543130.16602
2020	186927061121.37012
2021	237775842980.15506
2022	314745262795.3631
2023	322345419898.5511