Year	current US$
1971	1025962286.21008
1972	1242770059.49014
1973	1423086011.42387
1974	1596008477.40714
1975	2168767473.55224
1976	2200612037.1217
1977	2158623075.28042
1978	3703360699.97261
1979	4671942208.98481
1980	4414089507.92668
1981	4926693995.1076
1982	5378091008.01293
1983	5567445514.55686
1984	6007496024.29402
1985	6987249089.31709
1986	10620233614.5684
1987	11241757875.1025
1988	10696293273.9913
1989	8927286568.7249
1990	9418010961.78347
1991	9157339725.34757
1992	9403212511.11603
1993	13226678298.25
1994	6873257902.20908
1995	8371797946.48053
1996	8515409049.57081
1997	8287512791.43845
1998	9121307646.52915
1999	9440392087.30313
2000	8177309914.52665
2001	8619046990.79728
2002	9880691886.94979
2003	13053089712.3795
2004	15664636082.1773
2005	15715957536.6201
2006	16877066649.5916
2007	18969757358.6929
2008	21581006715.8356
2009	22751624879.4473
2010	21818986588.387
2011	23915383384.6581
2012	23348899791.737
2013	26529433377.688
2014	29222207040.0858
2015	26126342417.538
2016	27569000248.2872
2017	29270129659.7511
2018	32480898289.6183
2019	32359713829.9098
2020	33694392977.4165
2021	37065481265.8915