Year	U.S. Dollars
2002-01-01	1125600000
2003-01-01	1686100000
2004-01-01	1898300000
2005-01-01	3242900000
2006-01-01	3409800000
2007-01-01	3298800000
2008-01-01	3434200000
2009-01-01	4160100000
2010-01-01	5908000000
2011-01-01	7389600000
2012-01-01	9961500000
2013-01-01	10231400000
2014-01-01	8433000000
2015-01-01	8634000000
2016-01-01	7470800000
2017-01-01	8684700000
2018-01-01	9078400000
2019-01-01	9768100000