Year	U.S. Dollars
2000-01-01	8460500000
2001-01-01	8975200000
2002-01-01	9582500000
2003-01-01	10195700000
2004-01-01	11411400000
2005-01-01	12588700000
2006-01-01	15056900000
2007-01-01	17110600000
2008-01-01	21962600000
2009-01-01	23820000000
2010-01-01	26425400000
2011-01-01	28840200000
2012-01-01	30981000000
2013-01-01	33641300000
2014-01-01	35877500000
2015-01-01	37570400000
2016-01-01	38709300000
2017-01-01	40486600000
2018-01-01	42552900000
2019-01-01	44794300000