Year	current USD
1977	5650505.96227849
1978	14305862.294226801
1979	24355619.031493
1980	31844060.6002123
1981	31162681.747452598
1982	23551463.5899229
1983	24454614.2415651
1984	26109660.574412502
1985	20997913.3487861
1986	34310908.181402095
1987	73826342.8115359
1988	93747094.7560689
1989	102798415.794411
1990	156250839.84154502
1991	172269188.15172398
1992	177986045.607732
1993	185671482.870903
1994	170433762.315386
1995	165873977.80110502
1996	140560134.76926798
1997	160507675.114223
1998	181051047.355817
1999	169578756.16296202
2000	184718394.612119
2001	210322093.556759
2002	223549258.826132
2003	301014357.778797
2004	314038897.140142
2005	283835745.105521
2006	272934274.753837
2007	306451402.712573
2008	332400254.28967303
2009	330147278.73947996
2010	348672725.29226
2011	363324481.153045
2012	326874161.65079
2013	306438573.576809
2014	346281321.660338
2015	383739877.542959
2016	514463449.2296969
2017	522430455.515621
2018	498087432.354654
2019	514720930.23255795
2020	499027479.519605
2021	536630400.905482
2022	489324154.283931