Year	U.S. Dollars
2000-01-01	7129700000
2001-01-01	10034000000
2002-01-01	9164500000
2003-01-01	7587900000
2004-01-01	8342600000
2005-01-01	8985700000
2006-01-01	12669500000
2007-01-01	16727400000
2008-01-01	17221800000
2009-01-01	20365600000
2010-01-01	21361100000
2011-01-01	26016800000
2012-01-01	28979800000
2013-01-01	32245100000
2014-01-01	32278000000
2015-01-01	28333800000
2016-01-01	31172800000
2017-01-01	33220000000
2018-01-01	35106700000
2019-01-01	36733600000