Year	current US$
1972	25660221.802814946
1973	31059818.10801272
1974	40188671.44160098
1975	49528874.36186791
1976	51210068.541779965
1977	50344123.16799475
1978	51662385.8758711
1979	55584631.20634857
1980	59923965.975765735
1981	62302105.21640505
1982	61466146.576576896
1983	58517449.16063955
1984	56651475.46686445
1985	52883875.53851622
1986	51701885.892752096
1987	51750093.89791488
1988	55079582.75133621
1989	58464173.159464665
1990	63251703.69675415
1991	57823378.496312596
1992	55041568.97371302
1993	51112140.091306835
1994	50762769.22348036
1995	47806573.7681077
1996	43144541.98349596
1997	41573053.918892846
1998	36188303.18612976
1999	33579515.38854722
2000	31050383.848558065
2001	28376191.9851279
2002	25163947.09270941
2003	26669267.82980647
2004	31045678.02558705
2005	33395868.937494405
2006	34059506.18898591
2007	32776989.78423725
2008	48341677.12341215
2009	47242191.079956114
2010	51051916.59367886
2011	70710399.2693197
2012	99082229.65478605
2013	119182189.48141448
2014	134625538.7648296
2015	133868576.91592164
2016	130279385.14347248
2017	127997455.05612195
2018	146193593.2949788
2019	183592013.08308914
2020	200030800.02132443
2021	227906200.72227776
2022	265061756.33044744
2023	282280203.6573699