Year	U.S. Dollars
2000-01-01	11770400000
2001-01-01	11679100000
2002-01-01	11778400000
2003-01-01	12324300000
2004-01-01	14117000000
2005-01-01	19630400000
2006-01-01	22895700000
2007-01-01	26374300000
2008-01-01	39544600000
2009-01-01	29270500000
2010-01-01	38406200000
2011-01-01	49422100000
2012-01-01	54824900000
2013-01-01	59386200000
2014-01-01	56700700000
2015-01-01	39076600000
2016-01-01	31146900000
2017-01-01	36003300000
2018-01-01	41672800000
2019-01-01	42850000000