Year	U.S. Dollars
2009-01-01	9517400000
2010-01-01	10366600000
2011-01-01	17480700000
2012-01-01	20688000000
2013-01-01	19535700000
2014-01-01	20360700000
2015-01-01	12771700000
2016-01-01	8011700000
2017-01-01	8521400000
2018-01-01	10188800000
2019-01-01	11172700000