Year	current US$
1971	62445003.107438676
1972	59353844.171496205
1973	56719642.87846862
1974	66025169.10827238
1975	134163549.74056783
1976	168847099.48064104
1977	166460221.80619454
1978	223743127.6403353
1979	300584736.95090884
1980	389010786.0590842
1981	436697239.41941863
1982	401000948.3370824
1983	335977809.475997
1984	321474371.94892544
1985	280145724.7652205
1986	367654863.44746506
1987	500385962.6228014
1988	634176949.6940576
1989	609675219.331478
1990	783445628.5134516
1991	854077108.1786529
1992	864449209.3315161
1993	721694415.3288531
1994	776983981.3740366
1995	871001863.3972625
1996	725929691.9534639
1997	795103932.4298389
1998	775609600.4978676
1999	861242365.5586889
2000	638241758.5258195
2001	695514536.8727063
2002	913071919.5051595
2003	1022658448.7355077
2004	993569131.9983668
2005	954215860.007536
2006	836069423.8830494
2007	1133312275.9391894
2008	1775532513.8004096
2009	1334308266.2429614
2010	1654355955.0232456
2011	1760925702.1448252
2012	1683824249.8452482
2013	2182150146.939013
2014	2882188662.053199
2015	3046617509.839149
2016	2886202772.2649426
2017	3887923947.638906
2018	4314586614.266835
2019	4597856635.98769
2020	3706191778.913211
2021	4929835152.312529
2022	4973077100.634722