Year	current US$
1971	9316698097.56696
1972	10140386942.5523
1973	12845609589.4755
1974	18147437542.511
1975	19929733068.1794
1976	27463583867.6964
1977	35273366464.5378
1978	48141677065.277
1979	61305532148.8157
1980	58471001602.394
1981	64731611989.9792
1982	69288257338.0261
1983	77444481866.8532
1984	86029808125.8763
1985	88175477397.6087
1986	101466379705.431
1987	129296611725.963
1988	174592194502.299
1989	216710079684.057
1990	247451093734.849
1991	290161443539.63
1992	308780353788.278
1993	340018961358.03
1994	402354810822.917
1995	482631832039.22
1996	516050506400.998
1997	476983950463.31
1998	308228926496.473
1999	404941307990.113
2000	473203393364.577
2001	449163783711.707
2002	520348075347.16
2003	581089372111.169
2004	657357601633.453
2005	768610087951.538
2006	869431499653.526
2007	972408489014.838
2008	858477584744.289
2009	764972181994.193
2010	938427610118.629
2011	1027604773984.11
2012	1048427115416.14
2013	1120204286026.97
2014	1210603341380.1
2015	1196351007080.23
2016	1227205660047.13
2017	1329782799420.9
2018	1405043017491.22
2019	1337160677844.25
2020	1319310926924.01
2021	1452592702572.57