Year	current US$
1970	270595435.329498
1971	306191207.832862
1972	374143846.828762
1973	213675028.618152
1974	319509802.683504
1975	562700988.235295
1976	586845961.538462
1977	698471423.458901
1978	601810802.919708
1979	628025803.278689
1980	869942054.465359
1981	893826664.495115
1982	897077202.320887
1983	777629967.426711
1984	712627567.789647
1985	798075248.852808
1986	1051949642.13912
1987	1369506036.71553
1988	1780953760.44568
1989	1985094453.78151
1990	2596082619.88469
1991	3485868648.53615
1992	4439194449.06444
1993	4401767585.08914
1994	4398978753.62319
1995	5118756513.20155
1996	5920808983.6236
1997	6471825533.31359
1998	6670111607.57687
1999	5971572388.80655
2000	5789900298.08422
2001	6155210194.71795
2002	6783762982.21595
2003	8358394604.72377
2004	9350130850.51285
2005	9809547981.81559
2006	9979092321.49323
2007	11655996709.7364
2008	12118003247.4901
2009	12936274307.4225
2010	12564261250.7753
2011	12394918065.0485
2012	9582819970.94201
2013	11508869666.4774
2014	11448071246.656
2015	9278534636.59051
2016	9795753270.92484
2017	10690215392.0721
2018	10866568866.0704
2019	10723872452.9437
2020	10343764359.6166
2021	11496432254.1827