Year	current US$
1970	11733767.8501385
1971	7901977.73338936
1972	10189505.4273266
1973	41023553.0788868
1974	58983685.1985104
1975	10512248.7038115
1976	6885632.18359325
1977	11313777.6303236
1978	11977214.2067768
1979	45855672.3544619
1980	25710683.4398047
1981	7407567.86041535
1982	3385787.74637276
1983	0
1984	432766.962997093
1985	0
1986	0
1987	1703266.2716287
1988	86948265.4592019
1989	136688270.506747
1990	48618992.1779614
1991	16270296.3716886
1992	21352089.3842923
1993	165896.50261771
1994	3978047.95693485
1995	0
1996	0
1997	25759791.3615068
1998	0
1999	0
2000	22437551.7231405
2001	0
2002	0
2003	0
2004	46620366.4014841
2005	82432735.652453
2006	605043885.545747
2007	648144967.683089
2008	15041219.151746
2009	39141603.1203533
2010	143878014.452818
2011	134538246.836476
2012	49583896.4894267
2013	9357575.03795795
2014	20058757.2427249
2015	1303175.23171086
2016	28549166.1833598
2017	129085492.094184
2018	110004912.185026
2019	43758363.7407324
2020	39895025.2336454
2021	140959768.396344