Year	current US$
1970	22377552.2312839
1971	19410854.4382777
1972	21915181.6117522
1973	36645117.3682841
1974	40492749.4716532
1975	55829040.847684
1976	50080575.0202029
1977	89821817.8090357
1978	91723851.4047092
1979	85021356.5697947
1980	102748626.697318
1981	89809620.7358015
1982	126436091.593038
1983	84174449.8594929
1984	76283009.8961043
1985	55969119.7907531
1986	89981091.4421051
1987	88471783.8568062
1988	97167676.1614402
1989	100620691.852018
1990	125179680.420422
1991	126033328.844414
1992	128354234.510466
1993	107982766.960507
1994	127770344.988251
1995	187893761.595353
1996	186687041.03887
1997	174849553.437719
1998	181474150.524237
1999	115742970.625224
2000	114785209.45003
2001	62591089.695381
2002	19675415.5839057
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0