Year	current US$
1970	161576945.88638
1971	181502406.310278
1972	209213159.602714
1973	218481249.240069
1974	291677753.963125
1975	364080732.772852
1976	407339569.522041
1977	457490985.761655
1978	373676011.905305
1979	359917719.405805
1980	431935157.441217
1981	464094795.98895
1982	495968367.530346
1983	503904329.17158
1984	329608239.154677
1985	313017708.947918
1986	359069275.86224
1987	367913189.347007
1988	387285520.367554
1989	419701825.769374
1990	395703099.411853
1991	353939650.878128
1992	277755285.418548
1993	404911563.232269
1994	406562162.706658
1995	495334595.28803
1996	589359690.147483
1997	597455928.475488
1998	655848828.692275
1999	733136080.161829
2000	715538393.510217
2001	707579648.655458
2002	727242084.537303
2003	720171793.556897
2004	764682565.069523
2005	856643230.243885
2006	927075862.684974
2007	1016988964.32991
2008	1083541750.42729
2009	977158664.490411
2010	1067590517.2102
2011	1137078812.75624
2012	1157945353.9606
2013	1125609949.79955
2014	1095950826.09053
2015	1112937141.64605
2016	1092242196.67829
2017	1098898190.0641
2018	1157429967.72554
2019	1173717961.38691
2020	931994448.66006
2021	891307186.507869