Year	current US$
1970	181718676.985149
1971	186708352.541202
1972	204069898.896377
1973	250026606.031124
1974	729977603.104582
1975	982807348.839426
1976	1243267969.69874
1977	1551448995.23114
1978	1817609262.66818
1979	1243451088.00466
1980	3910645226.58539
1981	5608135622.81183
1982	5733358525.44213
1983	4897578758.2813
1984	4382276813.48585
1985	4888633111.11271
1986	4501048516.5267
1987	4549597366.26523
1988	4778526513.52017
1989	4545781021.46789
1990	4110273123.21508
1991	4913190486.723
1992	5435120928.0244
1993	5118097209.71567
1994	5248361621.5302
1995	5839015342.31965
1996	5730041304.12112
1997	8176535941.12921
1998	7017353249.29963
1999	8339183321.63918
2000	11390206560.8107
2001	12212118634.0462
2002	14771552241.4053
2003	18518412582.0731
2004	22955656009.927
2005	29399058150.259
2006	41661593720.9985
2007	54850395692.7773
2008	75883684758.2872
2009	63812422841.207
2010	76789644297.0726
2011	103225736009.471
2012	118906228101.314
2013	131786335715.898
2014	142481956910.961
2015	120141100027.234
2016	115701983315.067
2017	122516917362.986
2018	133380542292.003
2019	128532465470.175
2020	106756505660.991
2021	129445374904.435