Year	U.S. Dollars
2000-01-01	3057400000
2001-01-01	3218300000
2002-01-01	3395800000
2003-01-01	3991400000
2004-01-01	5125800000
2005-01-01	6410900000
2006-01-01	7745300000
2007-01-01	10172900000
2008-01-01	12795100000
2009-01-01	10766900000
2010-01-01	11638300000
2011-01-01	14434700000
2012-01-01	15846900000
2013-01-01	16140500000
2014-01-01	16515200000
2015-01-01	13995800000
2016-01-01	14330400000
2017-01-01	15138800000
2018-01-01	16141600000
2019-01-01	17433300000