Year	U.S. Dollars
2000-01-01	7894300000
2001-01-01	8732600000
2002-01-01	9458100000
2003-01-01	10996300000
2004-01-01	13183500000
2005-01-01	15446600000
2006-01-01	16926600000
2007-01-01	22009500000
2008-01-01	28386500000
2009-01-01	23910600000
2010-01-01	27284500000
2011-01-01	31917800000
2012-01-01	31888700000
2013-01-01	33338300000
2014-01-01	35791800000
2015-01-01	33295800000
2016-01-01	34266700000
2017-01-01	37916700000
2018-01-01	41319900000
2019-01-01	44081500000