Year	U.S. Dollars
2000-01-01	25857100000
2001-01-01	18936100000
2002-01-01	18969600000
2003-01-01	15800400000
2004-01-01	36642400000
2005-01-01	50065400000
2006-01-01	65144000000
2007-01-01	88833000000
2008-01-01	131613700000
2009-01-01	111660000000
2010-01-01	138516700000
2011-01-01	185749700000
2012-01-01	218032200000
2013-01-01	234637700000
2014-01-01	234651000000
2015-01-01	179837900000
2016-01-01	171716100000
2017-01-01	197699400000
2018-01-01	223258400000
2019-01-01	233401600000