Year	current US$
1970	1089781318.34704
1971	1283074018.1797
1972	1560744776.16166
1973	2078867032.5689
1974	2583693792.19667
1975	2944787453.9324
1976	3268406019.40812
1977	3986646977.52813
1978	4993083927.04384
1979	6281278957.28086
1980	6928071847.36635
1981	6580700518.95843
1982	6702847715.93779
1983	6414128071.28801
1984	6096760366.3604
1985	6123259811.24232
1986	7576194168.44759
1987	8877807919.69479
1988	9902967599.04811
1989	10230306401.9012
1990	12367430936.3305
1991	13262616441.3458
1992	14898956783.3869
1993	13952999674.0141
1994	15098732157.8515
1995	18764535353.85
1996	19931595720.4463
1997	19265068040.4588
1998	19739657928.1651
1999	19920357903.9053
2000	18875842403.8957
2001	19982514412.9586
2002	22855290050.0962
2003	29274798279.4346
2004	34166967300.8278
2005	35535588286.6122
2006	39122640112.7493
2007	45994926819.6021
2008	53481820416.1553
2009	52557890121.7158
2010	49563970054.745
2011	49674173812.6006
2012	43801815584.2874
2013	43063798206.342
2014	40798852332.2488
2015	32658504084.3711
2016	31510069481.1006
2017	31525428449.3441
2018	32492758609.6691
2019	30101017835.9034
2020	30098901681.2156
2021	31356148626.9421