Year Percent Change From Preceding Period 2004-01-01 14.28728736933810 2005-01-01 4.95935934717406 2006-01-01 2.05578806473456 2007-01-01 5.36970961323350 2008-01-01 4.45108502823249 2009-01-01 4.55423134443004 2010-01-01 5.04934139587907 2011-01-01 4.79622120572564 2012-01-01 4.64495878952509 2013-01-01 5.24140812013925 2014-01-01 6.26233207042666 2015-01-01 6.80815387248659 2016-01-01 7.22455640871651 2017-01-01 8.04941455743122 2018-01-01 6.19726190584231 2019-01-01 5.26622205242378