Year	US Dollars adjusted for inflation)
1990	11726468809.9862
1991	12464473403.117
1992	13487507289.9663
1993	14027272797.3816
1994	14970178938.0702
1995	15818893969.6799
1996	16552094535.0363
1997	17417953145.1976
1998	18464196395.9775
1999	19161317761.7723
2000	20345854252.2908
2001	21119738497.657
2002	21950849100.84909
2003	22773434821.6225
2004	23678154247.2068
2005	25002176981.6704
2006	25794848340.7069
2007	26655990768.934
2008	27628286550.1813
2009	28696459519.5156
2010	30906748941.2086
2011	26976987679.6102
2012	27622539534.8797
2013	28954889245.0068
2014	28900282799.8055
2015	18164766629.7403
2016	11927030389.4484