Year	current US$
1975	7315757.08013916
1976	9665925.92599487
1977	5103703.70373535
1978	5973333.33337402
1979	11232962.9630432
1980	7816666.66671753
1981	7336296.2963562
1982	8520000
1983	9930000
1984	15440000
1985	16580000
1986	28260000
1987	25600000
1988	28030000
1989	28070000
1990	27500000
1991	32540000
1992	50520000
1993	37806867.7923464
1994	45808258.3579926
1995	59438706.3419391
1996	47738676.6211506
1997	50698392.3405725
1998	59367608.1802758
1999	69730255.8351668
2000	63558884.5284907
2001	79718831.0402204
2002	87648341.4624844
2003	113767366.731074
2004	120139161.912642
2005	127320746.176333
2006	142632588.752235
2007	143848808.510004
2008	138022502.557881
2009	127860399.429427
2010	136600155.264423
2011	147868733.577765
2012	162045101.996445
2013	202580586.969295
2014	297046137.541925
2015	355728253.383608
2016	330090979.265027
2017	313645370.808951
2018	328659747.502549
2019	279133212.713698
2020	221808945.85044
2021	367511735.686638
2022	396505745.512243
2023	364367020.196401