Year	U.S. Dollars
2000-01-01	17759900000
2001-01-01	17538500000
2002-01-01	19363700000
2003-01-01	23533800000
2004-01-01	31734100000
2005-01-01	44530500000
2006-01-01	60882100000
2007-01-01	79712100000
2008-01-01	115270100000
2009-01-01	97798400000
2010-01-01	125122300000
2011-01-01	167775300000
2012-01-01	186833500000
2013-01-01	198727700000
2014-01-01	206224700000
2015-01-01	164641500000
2016-01-01	152468700000
2017-01-01	166325600000
2018-01-01	183807400000
2019-01-01	193905700000