Year	US Dollars
1990	972847658450.78674
1991	996878375609.36829
1992	1035323347064.28979
1993	1085927925719.28992
1994	1171123352141.96021
1995	1137771267120.40991
1996	1212351031407.96997
1997	1300703379341.76001
1998	1366159668882.07007
1999	1406117778674.84985
2000	1544255329415.41992
2001	1631324821926.33984
2002	1727187600108.43018
2003	1812987568483.86011
2004	1930134259393.7998
2005	1995545625541.42993
2006	2111679481294.46924
2007	2179183913177.57983
2008	2236790838132.44971
2009	2147467449704.6001
2010	2269955744959.83984
2011	2333995229813.09961
2012	2384231664942.12012
2013	2487201689181.40967
2014	2575315988110.70947
2015	2648165539470.04053
2016	2731356237770.22949
2017	2810045942494.06934