Year	U.S. Dollars
2000-01-01	13717500000
2001-01-01	11631600000
2002-01-01	9657000000
2003-01-01	10135100000
2004-01-01	12001500000
2005-01-01	14310300000
2006-01-01	17326400000
2007-01-01	22309700000
2008-01-01	29532000000
2009-01-01	33687900000
2010-01-01	38637900000
2011-01-01	45941400000
2012-01-01	51823700000
2013-01-01	57700100000
2014-01-01	63113200000
2015-01-01	66489300000
2016-01-01	66693200000
2017-01-01	47883100000
2018-01-01	40258500000
2019-01-01	47892100000