Year	U.S. Dollars
2000-01-01	2023500000
2001-01-01	2129900000
2002-01-01	3121100000
2003-01-01	4769200000
2004-01-01	6312100000
2005-01-01	7002800000
2006-01-01	8132600000
2007-01-01	9423600000
2008-01-01	11464100000
2009-01-01	9902800000
2010-01-01	10543400000
2011-01-01	15881800000
2012-01-01	17622100000
2013-01-01	19475500000
2014-01-01	19718700000
2015-01-01	18446500000
2016-01-01	16527000000
2017-01-01	16077600000
2018-01-01	17976200000
2019-01-01	18295500000