Year	current US$
1971	209930938.7
1972	245852554.3
1973	313813690.2
1974	357406890.9
1975	419735931.4
1976	449990753.2
1977	535669250.5
1978	731329772.9
1979	849240966.8
1980	2380181152
1981	2117616699.0000002
1982	2231766357
1983	2118541992
1984	1968478394
1985	2022923706
1986	2779070313
1987	3582102295
1988	3834042969
1989	3751835205
1990	4876062012
1991	4823001953
1992	4920209473
1993	4393696289
1994	4408901367
1995	4506990222.57265
1996	4329001332.59239
1997	3831354070.37815
1998	3908027809.16446
1999	3756184437.89766
2000	3603502764.34047
2001	3883047671.2182
2002	4653643267.7332
2003	5748398267.4502
2004	6515541640.72873
2005	6863864314.54527
2006	7484148242.43216
2007	9767490708.60801
2008	10973688792.7007
2009	12344791663.191
2010	12788812789.7547
2011	15337123634.9972
2012	14637030444.178
2013	16395715917.4197
2014	17048571932.0872
2015	15565846786.3135
2016	15192007972.7785
2017	17692276865.6043
2018	18903420948.9103
2019	18339309879.4911
2020	18174837589.3612
2021	19525985756.3492
2022	19006217351.6234
2023	20430799208.4835