Year	current US$
1975	18514945.98
1976	23807750.7
1977	46703990.94
1978	65478401.18000001
1979	91440734.86
1980	106253776.6
1981	95759994.51
1982	107548988.3
1983	97178131.1
1984	49415206.91
1985	50871543.88
1986	74044212.34
1987	77741462.71
1988	105305137.6
1989	70851074.22
1990	62883602.14
1991	101185310.4
1992	103113151.6
1993	77051124.57
1994	66893753.050000004
1995	74258863.4748787
1996	145460570.56626
1997	235253974.281213
1998	375411975.73708
1999	443613008.719749
2000	472728415.184529
2001	490718039.670651
2002	477152547.367382
2003	526381939.256486
2004	666913866.793652
2005	692277075.821046
2006	714798889.163735
2007	805950014.963268
2008	959188912.040189
2009	865768666.007242
2010	893815226.240978
2011	756066320.344963
2012	862122979.632129
2013	1073207238.90387
2014	1068529689.12229
2015	865419880.708975
2016	860964517.47309
2017	908303115.941151
2018	841053346.465202
2019	841961779.328994
2020	598130660.990562
2021	667355299.134199
2022	661569129.586041
2023	679060611.092622