Year	U.S. Dollars
2000-01-01	8556400000
2001-01-01	9446500000
2002-01-01	9449200000
2003-01-01	10841800000
2004-01-01	13168800000
2005-01-01	14652600000
2006-01-01	15983800000
2007-01-01	20057200000
2008-01-01	25188500000
2009-01-01	19922000000
2010-01-01	22237800000
2011-01-01	22601900000
2012-01-01	22249500000
2013-01-01	22081000000
2014-01-01	21693500000
2015-01-01	17546200000
2016-01-01	16988300000
2017-01-01	17409400000
2018-01-01	17296000000
2019-01-01	17854800000