Year	U.S. Dollars
2000-01-01	5895300000
2001-01-01	4401500000
2002-01-01	5146700000
2003-01-01	10271200000
2004-01-01	9574900000
2005-01-01	9610800000
2006-01-01	11352700000
2007-01-01	11496400000
2008-01-01	18609000000
2009-01-01	27210000000
2010-01-01	29827500000
2011-01-01	31587900000
2012-01-01	32176900000
2013-01-01	33891900000
2014-01-01	37304100000
2015-01-01	36724400000
2016-01-01	40223100000
2017-01-01	40642200000
2018-01-01	37502200000
2019-01-01	33657900000