Year	US Dollars
1995	21460836717.9873
1996	22732529305.3329
1997	24785995675.9986
1998	26915155287.14509
1999	26908833572.3571
2000	29062171947.4235
2001	32389110694.447
2002	35750856606.60749
2003	40189972233.05069
2004	43166737838.9692
2005	47618193205.89799
2006	52881275739.4906
2007	59369893935.69111
2008	64082315034.1032
2009	58454881499.39529
2010	61127157701.03951
2011	66665214259.49261
2012	71449725164.85329
2013	76801797518.05368
2014	81544882972.72908
2015	80209310943.96712
2016	82274017973.03322
2017	87757505756.4483