Year	current US$
1977	35689998.626709
1979	0
1980	86660003.6621094
1981	70190002.44140631
1982	64540000.9155273
1983	70040000.9155273
1984	73169998.1689453
1985	78900001.5258789
1986	57959999.0844727
1987	57229999.5422363
1988	70379997.253418
1989	85230003.3569336
1990	88860000.6103516
1991	88599998.4741211
1992	81629997.253418
1993	81620002.746582
1994	131270004.272461
1995	142550003.05175802
1996	138500000
1997	128899993.896484
1998	129089996.337891
1999	114930000.30517599
2000	87309997.55859381
2001	138740005.493164
2002	175309997.55859402
2003	153949996.94824198
2004	133759994.506836
2005	140050003.05175802
2006	144270004.272461
2007	148440002.44140598
2008	180380004.882813
2009	184820007.32421902
2010	200330001.831055
2011	184979995.727539
2012	190729278.564453
2013	191950683.59375
2014	179611282.34863302
2015	160694793.701172
2016	128850631.713867
2017	103917922.97363299
2018	110677917.480469
2019	170324218.75
2020	178602462.768555
2021	183994201.66015598
2022	197262090.2955532