Year	U.S. Dollars
2000-01-01	5795500000
2001-01-01	6026900000
2002-01-01	6383600000
2003-01-01	6967100000
2004-01-01	9406900000
2005-01-01	11859400000
2006-01-01	13231100000
2007-01-01	15700500000
2008-01-01	19246900000
2009-01-01	16481800000
2010-01-01	18267200000
2011-01-01	21331200000
2012-01-01	23007900000
2013-01-01	24206300000
2014-01-01	25020400000
2015-01-01	22726300000
2016-01-01	21653900000
2017-01-01	22188800000
2018-01-01	22871900000
2019-01-01	23737600000