Year	US Dollars
2008-01-01	4480152143
2009-01-01	4254200000
2010-01-01	4278847032
2011-01-01	4346376427
2012-01-01	4961882187
2013-01-01	5721658303
2014-01-01	6691218265
2015-01-01	5643453029
2016-01-01	6929672817
2017-01-01	6956654020
2018-01-01	7529160454
2019-01-01	8166955636
2020-01-01	8858778447
2021-01-01	9609205570