Year	U.S. Dollars
2000-01-01	1273100000
2001-01-01	1211700000
2002-01-01	1215300000
2003-01-01	1659300000
2004-01-01	2146700000
2005-01-01	2894800000
2006-01-01	4665100000
2007-01-01	7510500000
2008-01-01	9533800000
2009-01-01	12225500000
2010-01-01	14579500000
2011-01-01	18048600000
2012-01-01	22132700000
2013-01-01	22515000000
2014-01-01	24148600000
2015-01-01	24313300000
2016-01-01	26510500000
2017-01-01	28142300000
2018-01-01	28928400000
2019-01-01	28950500000