Year Percent Change From Preceding Period 2004-01-01 26.54160391263380 2005-01-01 5.01382057478352 2006-01-01 2.62473019398210 2007-01-01 12.01966160334800 2008-01-01 14.50390540468060 2009-01-01 -1.47541774858676 2010-01-01 -11.45117198814730 2011-01-01 3.57381836579852 2012-01-01 5.32661023445688 2013-01-01 -6.75686741000000 2014-01-01 -2.30122452105239 2015-01-01 -11.53313954241110 2016-01-01 -10.97607436000980 2017-01-01 -5.72251558552989 2018-01-01 -10.05993809275520 2019-01-01 -5.04342019396971