Year	US Dollars
1990	415437157476.86597
1991	481609926705.65497
1992	506336478771.53589
1993	525333588758.01807
1994	521930148232.29517
1995	555090408269.44189
1996	579874532245.01282
1997	599477499355.43896
1998	625382590410.03101
1999	630845619670.35193
2000	687848201997.99597
2001	709970276154.04797
2002	775134439279.97498
2003	858841243139.95203
2004	917845727079.48901
2005	977414708602.24182
2006	1060176006641.01001
2007	1179872577024.55029
2008	1206710216325.88013
2009	1223737897636.54004
2010	1311100331011.84033
2011	1373456121278.42017
2012	1303623814499.15015
2013	1321844068107.74023
2014	1402134250126.9502
2015	1397986972993.32983
2016	1606423207699.99048
2017	1705244016034.1499