Year	current US$
1970	1644172.7278338
1971	1989333.24992255
1972	1984139.06676104
1973	1563881.00977284
1974	3178709.55487561
1975	3026066.27002057
1976	2059398.55943517
1977	2874549.03981767
1978	2732243.87354952
1979	2405131.99839294
1980	2782415.50767609
1981	2731488.89607288
1982	3549039.75471945
1983	4733601.09452012
1984	5981511.56782046
1985	5865862.55974016
1986	5129787.51664693
1987	4558273.39199753
1988	4060412.00254028
1989	5934559.96835727
1990	5285775.67685516
1991	4752866.39674461
1992	5188547.95482685
1993	2573437.99466534
1994	2900840.97540646
1995	0
1996	67834.9792140211
1997	196054.772945038
1998	20999.4375135694
1999	0
2000	0
2001	0
2002	0
2003	0
2004	23497.5176830849
2005	74020.6997163552
2006	3522930.99185347
2007	5281432.94492817
2008	3344171.8963043
2009	2899344.97135515
2010	5121820.8634304
2011	8247908.64494117
2012	8263754.0528054
2013	2317787.55129281
2014	2666207.38852074
2015	6077772.96241182
2016	19289040.2901072
2017	24640446.1526828
2018	8549498.45844971
2019	572029.46611631
2020	125506.975610286
2021	6666137.72927409