Year Percent Change From Preceding Period 2004-01-01 1.35526399342837 2005-01-01 10.94601043480120 2006-01-01 3.20606706500204 2007-01-01 5.91363487667364 2008-01-01 19.63533961032250 2009-01-01 9.11673477787905 2010-01-01 8.21491962237842 2011-01-01 28.34163808504150 2012-01-01 2.62328754250641 2013-01-01 14.85945459604530 2014-01-01 14.37829463903180 2015-01-01 11.35687073704200 2016-01-01 7.15101138241849 2017-01-01 2.29923480693799