Year	US Dollars
2002	19202168208.0175
2003	21252007733.2421
2004	22134851020.62941
2005	25406550418.3726
2006	27761871367.4836
2007	32316545463.8146
2008	34181087567.11961
2009	41684373490.0272
2010	45732340266.1703
2011	49888820621.13931
2012	58374063905.60289
2013	61579304418.29601
2014	64014397930.13229
2015	65573681035.508
2016	68140183751.909
2017	71050265760.6393