Year	U.S. Dollars
2000-01-01	104752100000
2001-01-01	102272800000
2002-01-01	90261500000
2003-01-01	85163500000
2004-01-01	82854900000
2005-01-01	94127300000
2006-01-01	112901900000
2007-01-01	137055300000
2008-01-01	170796600000
2009-01-01	198316200000
2010-01-01	230024100000
2011-01-01	247726100000
2012-01-01	278768500000
2013-01-01	288007200000
2014-01-01	305567000000
2015-01-01	332074700000
2016-01-01	332483500000