Year Percent Change from Year Ago 2004-01-01 7.20953970903896 2005-01-01 5.74283048909850 2006-01-01 6.31717634262705 2007-01-01 4.90532450386191 2008-01-01 3.52953055244647 2009-01-01 -1.56423944177296 2010-01-01 5.84417729540682 2011-01-01 6.11091882904695 2012-01-01 5.31862800065257 2013-01-01 4.04500429786061 2014-01-01 1.76673978425607 2015-01-01 2.30525713802468 2016-01-01 1.26586760230296 2017-01-01 1.48990600495139