Year	current US$
1971	118719777.186827
1972	129893392.537396
1973	168757380.87635
1974	312539112.7309
1975	647288734.39075
1976	748940970.865086
1977	868577111.883257
1978	881952991.333901
1979	1019303085.33963
1980	1490975322.42673
1981	2395643619.45455
1982	2725711661.04294
1983	2003381583.57887
1984	1863249566.88159
1985	2169190593.45629
1986	1614064681.25496
1987	1291216487.5545
1988	1545163410.5103
1989	1906889769.77061
1990	2111156963.81397
1991	1925981145.58854
1992	1940543674.75851
1993	1810679696.882
1994	1889819575.51129
1995	2625480682.60663
1996	2552039275.80971
1997	2270227993.73993
1998	1479498235.16311
1999	1328849462.98272
2000	2414810103.18523
2001	2858546761.4209
2002	2315408911.10312
2003	2537303493.28282
2004	6193253896.37638
2005	6137012747.16754
2006	6823636559.17159
2007	8814485065.14153
2008	16668068834.0919
2009	6126636380.44452
2010	10646782884.6726
2011	14186120175.6997
2012	11058738274.9989
2013	9216679820.50095
2014	6653192956.4065
2015	3460266202.05884
2016	3710615251.42011
2017	5316659855.21359
2018	6592705046.20477
2019	5128570473.22379
2020	3645492662.23502
2021	7154669348.35717