Year Dollars 2004-01-01 12764796 2005-01-01 44682618 2006-01-01 121232067 2007-01-01 181409760 2008-01-01 231694291 2009-01-01 227994724 2010-01-01 230975772 2011-01-01 51271819 2012-01-01 71265500 2013-01-01 172048447 2014-01-01 64080418 2015-01-01 31990421 2016-01-01 33168703