Year	current US$
1970	17029296.2319148
1971	19303216.6180274
1972	22361877.5237658
1973	28413573.5132676
1974	31851154.3486669
1975	43234412.0086442
1976	47192516.3365208
1977	53794595.6884296
1978	69447504.2103545
1979	84440439.4603954
1980	101131301.264766
1981	94168755.9681301
1982	98419629.4559506
1983	98802950.5697982
1984	96257056.3486773
1985	103285387.062545
1986	135530117.771494
1987	168397122.828679
1988	185109877.965817
1989	189742518.401766
1990	232990220.554576
1991	229575645.961756
1992	252138632.835612
1993	238790435.788093
1994	156617671.364327
1995	187063145.65056
1996	200813933.570872
1997	195469377.184894
1998	237630231.699944
1999	287994158.364878
2000	186107084.536676
2001	201138263.911158
2002	235830682.492628
2003	302927531.789991
2004	384179037.581475
2005	439847204.890403
2006	510611154.049655
2007	599108470.538182
2008	770217738.492443
2009	802295642.281765
2010	817462629.733932
2011	932773508.827155
2012	950353848.372893
2013	1089528172.58454
2014	1119028881.12447
2015	873052593.844976
2016	796212193.869716
2017	931960568.797718
2018	1081103899.89159
2019	1196796385.34432
2020	1397995169.04794
2021	1617138864.17109