Year Dollars 1992-01-01 155392230 1997-01-01 192163168 2003-01-01 1084130629 2004-01-01 363393165 2005-01-01 230504038 2006-01-01 267900585 2007-01-01 196707204 2008-01-01 198712834 2009-01-01 115199303 2010-01-01 135238746 2011-01-01 178524099 2012-01-01 161657055 2013-01-01 257960021 2014-01-01 334378082 2015-01-01 242436055 2016-01-01 230673717