Year	current US$
1970	7869999.980553982
1971	10529999.908059834
1972	14150000.13262033
1973	12119999.922811978
1974	53340000.391006425
1975	44290000.67710874
1976	22280000.142753124
1977	22580000.10252
1978	30489999.383687995
1979	52040001.12414356
1980	29050000.56698921
1981	58440000.304952234
1982	58419998.88420105
1983	28629999.756813046
1984	45809999.76396562
1985	15059999.998658892
1986	16030000.49293042
1987	15539999.77000057
1988	21250000.4414469
1989	57000000
1990	47319999.48620799
1991	48849999.904632516
1992	39509999.513626084
1993	43090000.21219252
1994	52529999.67336652
1995	51499999.73177914
1996	57759999.990463234
1997	49359999.80568884
1998	42819999.87363808
1999	31779999.62866308
2000	46639999.44925312
2001	46049999.71389777
2002	54500000.23841858
2003	42830000.22172924
2004	87400001.28746033
2005	109510000.10967259
2006	90359998.82221231
2007	126470002.41279602
2008	250990000.24795505
2009	246359998.94142157
2010	376670000.07629454
2011	436340001.10626185
2012	574169991.9700619
2013	358710006.2370298
2014	402599999.4277954
2015	257460000.9918214
2016	164639996.52862555
2017	205730000.3767013
2018	217090000.27179727
2019	178730003.118515
2020	163270002.72274023
2021	224459997.4155425
2022	249360002.39849088