Year	current US$
1971	5400000.095
1972	3279988.05
1973	7940000.057
1974	97286626.114
1975	393371823.33300006
1976	509435947.145
1977	610664138.5059998
1978	851763713.5765002
1979	1209196247.6678998
1980	1536069624.5673997
1981	1183308824.1928
1982	1061603674.3059001
1983	1035450621.8949999
1984	943112149.6190001
1985	968346006.5853999
1986	1274828959.8985999
1987	1349685725.9699
1988	1313196936.3339005
1989	1125176168.9039
1990	1184989540.1434364
1991	1148112628.1682925
1992	1203277972.940543
1993	1092413192.2540357
1994	833772927.9399409
1995	829682522.088222
1996	931925386.6812027
1997	962093220.1026978
1998	974050004.8081908
1999	1260401816.3910332
2000	1347597977.9036422
2001	1278051003.5581462
2002	1496566369.7237053
2003	1541239761.612975
2004	1594752311.9732497
2005	1749465456.7609925
2006	1923692100.4839945
2007	2177658921.436741
2008	2740534531.120464
2009	3389954907.273716
2010	4021905058.828898
2011	4631107978.521871
2012	4881458799.7403145
2013	5515231575.806562
2014	5095576682.284816
2015	7541119930.070191
2016	6425204123.353757
2017	6336296546.587989
2018	7220353030.961177
2019	6869157576.372585
2020	6753077414.426144
2021	6823031409.625626
2022	6638847557.213451