Year	current US$
1967	24026312.955153644
1968	27839977.72801782
1969	28559977.15201828
1970	50399959.68003225
1971	96727622.71414821
1972	160511552.40207103
1973	266627884.42893156
1974	786045165.0260568
1975	1062826288.3613203
1976	1176896641.5749855
1977	1207295599.3051536
1978	1335263173.1325998
1979	1519976548.9287784
1980	2252461204.400695
1981	2764910538.50608
1982	3259988419.224088
1983	3019687319.0503764
1984	3315025608.2131577
1985	3720377828.2835593
1986	2997523181.720605
1987	2270480884.26528
1988	2629388816.6449933
1990	3224967490.247074
1991	3940182054.616385
1992	4426527958.387516
1993	4754226267.880364
1994	4494148244.473342
1995	4907672301.690507
1996	5464239271.781534
1997	6111833550.06502
1998	7003901170.351105
1999	6013003901.170351
2000	6351105331.59948
2001	7209362808.842652
2002	7513654096.2288685
2003	8657997399.219767
2004	11024707412.223667
2005	11172951885.56567
2006	13778542002.60078
2007	19439087126.13784
2008	26587776332.899868
2009	21537061118.3355
2010	24237485045.513653
2011	29235370611.183353
2012	34396618985.69571
2013	41831729518.85566
2014	37856957087.12614
2015	36777113133.94018
2016	31210923276.983093
2017	34960468140.44213
2018	35374252275.6827
2019	32568530559.16775
2020	34022401820.54616
2021	36502257477.24317