Year	U.S. Dollars
2000-01-01	38270500000
2001-01-01	34111900000
2002-01-01	20471300000
2003-01-01	26186300000
2004-01-01	32996000000
2005-01-01	47334500000
2006-01-01	54963300000
2007-01-01	67690400000
2008-01-01	73916700000
2009-01-01	50807600000
2010-01-01	68973700000
2011-01-01	31999000000
2012-01-01	79759200000
2013-01-01	51895800000
2014-01-01	24262400000
2015-01-01	17194200000
2016-01-01	18539400000
2017-01-01	31330900000
2018-01-01	43635500000
2019-01-01	46922800000