Year U.S. Dollars 2000-01-01 109400000 2001-01-01 161100000 2002-01-01 192800000 2003-01-01 174300000 2004-01-01 352200000 2005-01-01 474000000 2006-01-01 881300000 2007-01-01 1361000000 2008-01-01 1480200000 2009-01-01 2110700000 2010-01-01 2263900000 2011-01-01 2818300000 2012-01-01 2873000000 2013-01-01 2823400000 2014-01-01 2699100000 2015-01-01 2520700000 2016-01-01 2756400000 2017-01-01 3039300000 2018-01-01 3340500000 2019-01-01 3722000000