Year	current US$
1974	13472680.8383646
1975	45611556.7446461
1976	73385784.6468796
1977	94706225.1633621
1978	113608512.213578
1979	113704927.489369
1980	158744508.593417
1981	96362337.4675517
1982	76124506.2000204
1983	92498850.4458136
1984	80100442.4704618
1985	83418804.9209139
1986	96446656.514134
1987	127160624.21087
1988	140008662.782091
1989	180614472.888795
1990	216466813.105519
1991	171931836.67339
1992	309055045.581421
1993	264288572.765613
1994	296970645.340239
1995	298195460.691394
1996	253999529.961233
1997	294839207.126203
1998	358611455.474751
1999	375930168.654293
2000	351794140.719257
2001	271776570.233601
2002	275844476.909858
2003	277512201.613467
2004	323561615.646859
2005	243897157.253523
2006	372529356.202649
2007	774192962.828771
2008	751935734.699347
2009	958869319.489231
2010	756344144.775586
2011	600507428.767504
2012	740960093.303333
2013	762540937.776334
2014	690755431.118014
2015	547997264.064542
2016	564314115.627588
2017	563119751.253451
2018	440685903.013845
2019	440314152.603376
2020	545564174.123745
2021	572281510.898637
2022	452351748.185594
2023	479261051.167948