Year	current US$
1970	4303681.36927561
1971	4788341.04883417
1972	5364746.62196709
1973	10437246.652841
1974	16875799.3680434
1975	8253833.18490416
1976	14419340.2583215
1977	10555895.4291084
1978	6291110.57706833
1979	10559441.1855998
1980	12808469.6321074
1981	6188509.62438322
1982	4861032.04935306
1983	3201505.44283408
1984	3120253.04268216
1985	2837445.53199852
1986	2036930.96586312
1987	2836997.63632343
1988	102396626.422561
1989	76206601.9581869
1990	14877257.2953164
1991	56378672.5930017
1992	33088924.5247736
1993	12318696.3866467
1994	6669281.17119122
1995	4425340.95026504
1996	4095451.75501595
1997	4242700.81347623
1998	2410690.5815758
1999	4265859.87499956
2000	7108909.52814529
2001	2639128.83539847
2002	3695973.26591541
2003	3726398.68093371
2004	24415809.3603812
2005	31891198.9456294
2006	149024440.890424
2007	351799845.456483
2008	26979795.0194209
2009	14398738.218479
2010	44009404.96211
2011	74840494.9637456
2012	65998000.9167644
2013	61749572.0524735
2014	48246717.5751178
2015	16678222.4661016
2016	38925546.2748495
2017	39817232.5788741
2018	47471134.3626942
2019	28210415.2987826
2020	17612694.6312897
2021	77336787.7719607