Year Percent Change From Preceding Period 2004-01-01 5.57784371388679 2005-01-01 5.86819483395327 2006-01-01 6.24987854697267 2007-01-01 4.34681897226772 2008-01-01 9.14979908145120 2009-01-01 4.84448699094987 2010-01-01 7.89971201153291 2011-01-01 14.04712346038740 2012-01-01 9.29278945838882 2013-01-01 7.31252508495827 2014-01-01 3.98746798718393 2015-01-01 3.83544063230718 2016-01-01 3.72190295994337 2017-01-01 8.43857724256684 2018-01-01 6.29256421766255 2019-01-01 7.59784539548994