Year	U.S. Dollars
2000-01-01	5272600000
2001-01-01	5475400000
2002-01-01	6232100000
2003-01-01	7275800000
2004-01-01	8681500000
2005-01-01	13273300000
2006-01-01	21027100000
2007-01-01	33089500000
2008-01-01	48979200000
2009-01-01	44288700000
2010-01-01	52913100000
2011-01-01	65989900000
2012-01-01	69686900000
2013-01-01	74160500000
2014-01-01	75240300000
2015-01-01	50844200000
2016-01-01	37809800000
2017-01-01	40669700000
2018-01-01	45482900000
2019-01-01	47926300000