Year Dollars 1992-01-01 12027435 1997-01-01 31880427 2002-01-01 25488697 2003-01-01 25297943 2004-01-01 29649021 2005-01-01 30571818 2006-01-01 34143281 2007-01-01 39420364 2008-01-01 58941894 2009-01-01 35455518 2010-01-01 37011148 2011-01-01 42550666 2012-01-01 51215613 2013-01-01 52613937 2014-01-01 42498225 2015-01-01 45556227 2016-01-01 30697192