Year	current US$
1970	0
1971	0
1972	0
1973	583276.901815758
1974	5302255.39328321
1975	4685805.61550357
1976	13352306.4516101
1977	10141929.733564
1978	2098265.83500652
1979	12894479.8667207
1980	13572005.3078472
1981	4249940.09077018
1982	1653607.15235378
1983	3528069.44656908
1984	1453129.63535548
1985	2118666.43197425
1986	26328.2612012856
1987	2321609.21155706
1988	112533262.770375
1989	96465794.0073847
1990	28453166.3462956
1991	60287760.8773744
1992	32983728.2816988
1993	13716296.577053
1994	25573370.9123595
1995	43284286.5595015
1996	13385672.1535446
1997	19438692.6524022
1998	4837886.04025588
1999	33612100.7449883
2000	74132557.9098173
2001	22967081.4443958
2002	14273419.6507553
2003	78396092.7468624
2004	175997958.004904
2005	137689955.885912
2006	443983980.711767
2007	499748202.014835
2008	204652850.204738
2009	94283702.5628491
2010	108727922.364361
2011	107426989.972123
2012	116358017.400939
2013	48160580.335656
2014	21315696.9243753
2015	4772845.05956155
2016	6893242.84504168
2017	7130408.20393419
2018	8132278.5480301
2019	7184690.09442085
2020	7629031.16031097
2021	31587047.0960637