Year	current US$
1960	27200000
1961	27800000
1962	31800000
1963	32500000
1964	20444000
1965	22640000
1966	20000000
1967	15900000
1968	27500000
1969	35400000
1970	39360000
1971	38407453.4593209
1972	46452033.0183509
1973	51775197.5544667
1974	54623869.9317105
1975	28412394.9387891
1976	25204166.3317542
1977	33400597.6406644
1978	34786615.0763264
1979	46700000
1980	30600000
1981	15950187.3982706
1982	8429491.57835868
1983	16204695.5976597
1984	7749010.47848833
1985	10821968.3655536
1986	13654727.0436559
1987	6328373.22135369
1988	7426913.91584019
1989	3726283.28120483
1990	5428453.14478383
1991	9628608.61977714
1992	18925006.393774
1993	28965193.532534
1994	40639713.6070937
1995	34618040.6940101
1996	26591784.8474042
1997	38464889.7931868
1998	43857037.5168082
1999	39474579.5926659
2000	49207274.4210529
2001	51311629.2747664
2002	84690145.2514573
2003	66617191.3528423
2004	125104244.368796
2005	170505508.389789
2006	183927216.134409
2007	216555180.811995
2008	220167661.341698
2009	404964508.63092
2010	408971756.317223
2011	439130952.881157
2012	477987067.655214
2013	532538016.704371
2014	600784544.071814
2015	579013520.60832
2016	497242646.676568
2017	549121050.851388
2018	501210759.592547
2019	530137881.482077
2020	707703898.12545
2021	945907747.182478
2022	624496474.631725
2023	495698793.817761