Year	current US$
1970	198398968.49756
1971	172647274.372478
1972	196678963.631218
1973	337608481.915477
1974	378777995.502702
1975	527568312.598894
1976	475476485.463054
1977	893199907.844348
1978	930654900.257129
1979	867193079.772247
1980	1068161674.92118
1981	959849795.518567
1982	1399033078.64729
1983	911619891.672894
1984	863221166.982281
1985	648019730.026661
1986	1044035358.26889
1987	1004670880.61224
1988	1130175694.69535
1989	1172078553.98598
1990	1446838818.75897
1991	1504149869.03403
1992	1575678139.66988
1993	1284848363.07917
1994	1576138079.86204
1995	2419304237.37118
1996	2441608928.30456
1997	2319341874.97264
1998	2436037274.14439
1999	1503538845.59395
2000	1513023847.28194
2001	1483373581.29794
2002	1806783700.81378
2003	3109720970.23613
2004	2813224916.41072
2005	2904864290.88758
2006	2855173449.85439
2007	4290946886.43696
2008	5052051921.28683
2009	5289715527.31242
2010	4647249240.46428
2011	5339462574.14503
2012	6225275776.8375
2013	6508091916.92253
2014	7312200484.76593
2015	7801227499.12243
2016	8255983402.91398
2017	7985486026.3033
2018	5336446464.07236
2019	5251925446.3313
2020	5827507750.96245
2021	6233766464.22958