Year	current US$
1960	462609997.253865
1961	921629992.831498
1962	850760007.455945
1963	820739997.8078899
1964	715150011.565536
1965	874750003.509223
1966	1013480016.35075
1967	906169993.638992
1968	928469999.104738
1969	846549991.831183
1970	917000005.468726
1971	897099989.950657
1972	977099996.46619
1973	988170003.6935511
1974	1183460000.27657
1975	1576519998.59884
1976	1733870011.24024
1977	1523250007.45058
1978	2016630016.3865101
1979	3781420042.5148
1980	4392140013.21793
1981	4759249948.02475
1982	4263040023.80371
1983	4056119950.78065
1984	4184699962.1391296
1985	4242360003.94821
1986	4765559989.9292
1987	5877870029.44946
1988	5817589980.60226
1989	6233130015.14412
1990	8903959925.89928
1991	11032340009.26651
1992	10438680005.082859
1993	11675589826.11634
1994	11548190078.97377
1995	13585069980.14453
1996	11221379889.056087
1997	9565350050.92621
1998	10662169875.621792
1999	13086800000.90596
2000	11298310038.08976
2001	10579120208.740238
2002	12439719899.17757
2003	13365759844.78001
2004	16736559878.349321
2005	32112399751.4248
2006	19851690330.0285
2007	20255439785.9573
2008	23289350320.816
2009	16827390094.7571
2010	14203430052.7573
2011	18696229971.8857
2012	16401289959.9075
2013	15674250101.089499
2014	17717290086.2694
2015	15880230107.6651
2016	19752910103.7979
2017	18170449910.0447
2018	16320120145.3209
2019	14238110007.5245
2020	20389460029.1252
2021	19375850252.1515