Year	U.S. Dollars
2000-01-01	655600000
2001-01-01	591000000
2002-01-01	754300000
2003-01-01	883000000
2004-01-01	1127300000
2005-01-01	1396800000
2006-01-01	2253200000
2007-01-01	3218100000
2008-01-01	4746400000
2009-01-01	3316800000
2010-01-01	3623500000
2011-01-01	4484400000
2012-01-01	5478300000
2013-01-01	6722900000
2014-01-01	6521300000
2015-01-01	4900900000
2016-01-01	4788900000
2017-01-01	5321900000
2018-01-01	6322600000
2019-01-01	6835200000