Year	U.S. Dollars
2000-01-01	2448400000
2001-01-01	2445500000
2002-01-01	3173500000
2003-01-01	3594800000
2004-01-01	3598700000
2005-01-01	4358500000
2006-01-01	5014700000
2007-01-01	9524300000
2008-01-01	11446300000
2009-01-01	12204000000
2010-01-01	13026000000
2011-01-01	14366700000
2012-01-01	14339900000
2013-01-01	15951400000
2014-01-01	16324800000
2015-01-01	17544300000
2016-01-01	20262400000
2017-01-01	16089500000
2018-01-01	15589500000
2019-01-01	15089500000