Year	current US$
1970	10190113.1616984
1971	6373649.80845472
1972	5962953.94497045
1973	10350492.1431835
1974	9864318.1123715
1975	3127978.93552354
1976	4051772.15095905
1977	1927653.64587632
1978	1535004.86502435
1979	693716.862188629
1980	761017.931211332
1981	0
1982	205838.53154384
1983	404865.14863129
1984	295362.216541707
1985	281979.92064392
1986	89068.8243458013
1987	32053.9679541438
1988	221139.364036438
1989	612571.36093426
1990	367614.366548224
1991	72241.1197017051
1992	72423.0823507301
1993	44405.4311671528
1994	0
1995	0
1996	392690.527661548
1997	964071.21907391
1998	421822.875595412
1999	576412.479230363
2000	948081.822953723
2001	422300.318840657
2002	557858.879095043
2003	492944.73131785
2004	741398.709233644
2005	0
2006	0
2007	628091.093019088
2008	468001.607844664
2009	2503310.47893927
2010	4946712.74485517
2011	8608124.99381906
2012	7347577.61801209
2013	4703287.02775891
2014	3538403.40083868
2015	1798120.80512297
2016	0
2017	722472.474336169
2018	763563.229253612
2019	580738.114374684
2020	1314665.16375144
2021	2623796.31934394