Year	current US$
1967	61584687.22987658
1968	60479951.6160387
1969	67199946.240043
1970	82559933.95205283
1971	114051973.05101058
1972	200118299.09868595
1973	295429399.21751136
1974	714533873.7695426
1975	996236537.3480023
1976	1223219745.22293
1977	1490156340.474812
1978	1688477127.967574
1979	2002605674.5801969
1980	3152865952.518819
1981	3658946438.911407
1982	4382455124.493341
1983	4595541401.273886
1984	5056500201.217729
1985	5974898304.839386
1986	5102334403.191773
1987	4794017685.305592
1988	5554486345.90377
1989	5878803901.170351
1990	7948244473.342003
1991	8693888166.449934
1992	9274122236.671001
1993	9678283485.045513
1994	9823927178.153446
1995	10564629388.816645
1996	11039791937.581274
1997	11230169050.715214
1998	10324480884.26528
1999	10554004681.40442
2000	11089279323.797138
2001	11753229388.816645
2002	12047694408.322496
2003	12945608842.652796
2004	14756895448.63459
2005	15962532379.713913
2006	17990214304.291286
2007	20804637711.313393
2008	25716202860.858257
2009	27002498309.492847
2010	29720197139.141743
2011	35761768530.559166
2012	40573732119.63589
2013	43282704811.443436
2014	47069700910.27308
2015	47778933680.10403
2016	48186215864.75943
2017	51488686605.9818
2018	51574512353.70611
2019	53388556566.97009
2020	53245194278.283485
2021	58607387516.254875