Year	current US$
1970	15166153.4581944
1971	13211672.4380572
1972	14932648.2583748
1973	26455967.806875
1974	31115521.9104275
1975	41715915.0118085
1976	38403936.8547282
1977	71048762.81334
1978	74641714.3575737
1979	71761787.2092403
1980	92577000.4342091
1981	83955837.1252901
1982	123624255.452469
1983	83309086.9474706
1984	77539954.181821
1985	55493938.5304196
1986	91092953.9244151
1987	87888791.7907539
1988	98533714.4086344
1989	100759795.158256
1990	123677009.009781
1991	127117375.92108
1992	137565897.169707
1993	111260171.614574
1994	137625357.32315
1995	216673313.146836
1996	225137865.065143
1997	220395504.093072
1998	237496813.468281
1999	144661039.480273
2000	148367488.996828
2001	150141141.042335
2002	186302165.046804
2003	338102537.925593
2004	315368820.216455
2005	326100079.832382
2006	325956140.195253
2007	494548445.370784
2008	602416598.41949
2009	659369674.046225
2010	582157545.166058
2011	683293346.37326
2012	789929955.353286
2013	815290217.883179
2014	919182634.296269
2015	1007044021.51687
2016	1081645268.15742
2017	1048729855.33894
2018	687246941.489723
2019	695867125.386013
2020	788467253.088022
2021	857058700.821533