Year	U.S. Dollars
2000-01-01	15160600000
2001-01-01	14269300000
2002-01-01	14179100000
2003-01-01	14844700000
2004-01-01	14800100000
2005-01-01	18652300000
2006-01-01	22494300000
2007-01-01	29595300000
2008-01-01	36694100000
2009-01-01	30945900000
2010-01-01	35060100000
2011-01-01	26413400000
2012-01-01	15238100000
2013-01-01	14484900000
2014-01-01	16289000000
2015-01-01	19548500000
2016-01-01	17096800000
2017-01-01	30652400000
2018-01-01	35515500000
2019-01-01	34015500000