Year	US Dollars
2008-01-01	56413000000
2009-01-01	40553000000
2010-01-01	46039000000
2011-01-01	52487000000
2012-01-01	49621000000
2013-01-01	50799000000
2014-01-01	53086000000
2015-01-01	46899000000
2016-01-01	47512265903
2017-01-01	55488253832
2018-01-01	59542022265
2019-01-01	63166758812
2020-01-01	64429073595
2021-01-01	66220375194