Year	U.S. Dollars
2000-01-01	3430300000
2001-01-01	3174300000
2002-01-01	4117200000
2003-01-01	5365600000
2004-01-01	5446100000
2005-01-01	5448000000
2006-01-01	6978100000
2007-01-01	7928900000
2008-01-01	8915400000
2009-01-01	12121700000
2010-01-01	13616900000
2011-01-01	12107300000
2012-01-01	8829500000
2013-01-01	13824000000
2014-01-01	16044000000
2015-01-01	16569600000
2016-01-01	15540100000
2017-01-01	15665400000
2018-01-01	16790500000
2019-01-01	17937700000