Year	current US$
1975	74989851.98752537
1976	115451142.8286256
1977	117277257.32509467
1978	125429324.31760554
1979	148660070.60110378
1980	196539551.53383386
1981	257495152.38900214
1982	225923532.0439517
1983	206383930.7910307
1984	188783373.93725452
1985	181126634.51499033
1986	212399940.33709544
1987	228658081.8376175
1988	265947397.20578733
1989	320787550.34057575
1990	301944016.3078606
1991	255655546.16417247
1992	162000000
1993	190871575.59787205
1994	226818475.61278775
1995	258539253.2193109
1996	297419579.37652266
1997	382936409.28752553
1998	528464177.39770305
1999	561378213.0960076
2000	550300000
2001	499650000
2002	548400000
2003	589100000
2004	658000000
2005	717750000
2006	892046200
2007	881149200
2008	868633700
2009	748388750
2010	710817550
2011	784834250
2012	736175400
2013	763288050
2014	766977400
2015	788416250
2016	782342800
2017	768658200
2018	717492200
2019	762213800
2020	839736200
2021	840771600
2022	963490400