Year	current US$
1970	111437081.906135
1971	135022197.390391
1972	151010982.61458
1973	85727206.688429
1974	515448590.605363
1975	786435106.661876
1976	1132213225.15104
1977	1385651713.65919
1978	1521606918.33036
1979	1352431975.20544
1980	3156186537.13979
1981	4343028707.42703
1982	5121982473.66813
1983	5047005347.5749
1984	5766206417.06755
1985	6266889240.78458
1986	4930149997.77641
1987	4661733363.46507
1988	4980783017.6391
1989	5110163542.11753
1990	5985148340.0094
1991	7167675878.357
1992	7767107025.12575
1993	7785872888.4996
1994	8254245481.94676
1995	8698172971.07966
1996	9057062661.23965
1997	9810956848.16204
1998	9283102956.90533
1999	9464851281.83478
2000	10270007363.1122
2001	11190902294.3563
2002	12482506717.3223
2003	13427563943.112
2004	14731388306.747
2005	17014254693.1589
2006	21321056768.3658
2007	24438381958.0044
2008	35464366278.1512
2009	26554113593.0737
2010	35677488138.9959
2011	38236352519.43
2012	45465025430.4268
2013	48156584313.4962
2014	50531647043.364
2015	51311067027.2959
2016	50684475111.2327
2017	53061502389.1152
2018	61210911185.3696
2019	59074357919.7336
2020	54445023707.397
2021	56515483861.806