Year	current US$
1970	838455972.370375
1971	681356966.311896
1972	718144230.75863
1973	1710024127.22934
1974	2179856694.66032
1975	1020085812.69427
1976	1096350300.08838
1977	909045122.172121
1978	590268741.625535
1979	1191833141.12911
1980	1872935517.74861
1981	1139855303.57943
1982	837236182.290532
1983	983072102.127267
1984	1083990027.60684
1985	931975613.751356
1986	687999075.092982
1987	1183974461.15185
1988	4024015019.81877
1989	3330339135.02551
1990	2488506120.70148
1991	2081226703.12586
1992	1579631845.70478
1993	931756258.423683
1994	1276593857.37999
1995	1790930159.50451
1996	1435236457.36326
1997	1081803344.23249
1998	508629850.712048
1999	602150962.840598
2000	899567023.817988
2001	699102104.314496
2002	816300553.673972
2003	1035594311.44243
2004	2174515234.07586
2005	2300509223.19742
2006	5927342801.84424
2007	8197423172.26275
2008	5534963914.76476
2009	2112397820.36207
2010	4522119039.22543
2011	6723381412.16299
2012	4527355854.7651
2013	3288144123.82514
2014	3286027968.94054
2015	1851564271.9197
2016	1836731684.05217
2017	2377410085.88057
2018	1652056007.12705
2019	1874844385.09443
2020	2209828222.51228
2021	15594676745.316