Year	U.S. Dollars
2000-01-01	37720700000
2001-01-01	34886200000
2002-01-01	38135400000
2003-01-01	47844200000
2004-01-01	59439200000
2005-01-01	80806600000
2006-01-01	101559300000
2007-01-01	114677100000
2008-01-01	147402400000
2009-01-01	105992300000
2010-01-01	115400900000
2011-01-01	154019700000
2012-01-01	174065900000
2013-01-01	174179400000
2014-01-01	162695100000
2015-01-01	114606200000
2016-01-01	110873200000
2017-01-01	120351400000
2018-01-01	135304800000
2019-01-01	140146000000