Year	US Dollars
1991	213996051147.79996
1992	222027367819.061
1993	237454299303.89401
1994	263558087092.17599
1995	286074860606.08099
1996	311040100649.31195
1997	338880858174.10309
1998	361368724730.27002
1999	382045561894.87396
2000	405772625414.302
2001	423616173834.39301
2002	448875010765.11493
2003	463716172457.50299
2004	493499386693.37598
2005	521487795801.552
2006	565654536874.76221
2007	620461733250.72107
2008	684958498960.23499
2009	713497714686.51599
2010	775393314444.70093
2011	841506497082.30774
2012	878843738447.62891
2013	911939819925.14404
2014	940162137507.90796
2015	975691602185.99915
2016	998603147254.1239
2017	1060191634094.64966