Year	current US$
1975	6481423.630480866
1976	46066444.511764176
1977	75555758.86957406
1978	121050462.29252534
1979	244728982.03592816
1980	419358208.9552239
1981	415116317.9916318
1982	410401356.3501849
1983	378211012.23581755
1984	506277567.2981057
1985	537668522.0729367
1986	764140564.9717511
1987	883852496.954933
1988	971565997.4905896
1989	1117971597.633136
1990	1198645966.709347
1991	913627020.2020202
1992	1210723468.0573664
1993	1558872320.376914
1994	1865223214.2857144
1995	2555390685.6403623
1996	2385498117.9422836
1997	2166937286.202965
1998	2210192307.6923075
1999	2371005393.7432575
2000	2297736098.0207353
2001	2335729508.196721
2002	2470236538.4615383
2003	3083365798.414496
2004	3801267500
2005	4039755005.5963187
2006	4349696399.447999
2007	4703643580.6186695
2008	4509018602.607295
2009	4565753308.554317
2010	4058332911.548843
2011	4191837053.0544996
2012	3599406127.712513
2013	3488448122.993599
2014	3387061904.2835007
2015	3263381417.741017
2016	4063708090.695434
2017	4658729482.964742
2018	5297176177.594172
2019	5408057094.99474
2020	4945202016.610737
2021	6898084482.98399
2022	6338263948.977219
2023	6745051012.0021