Year	U.S. Dollars
2000-01-01	2895400000
2001-01-01	2696200000
2002-01-01	2233600000
2003-01-01	2516400000
2004-01-01	3137400000
2005-01-01	3573900000
2006-01-01	3683400000
2007-01-01	4284100000
2008-01-01	4645300000
2009-01-01	4943200000
2010-01-01	5264300000
2011-01-01	5723200000
2012-01-01	6299900000
2013-01-01	6804000000
2014-01-01	7208900000
2015-01-01	7537600000
2016-01-01	7602700000
2017-01-01	8486900000
2018-01-01	9190100000
2019-01-01	9366800000