Year Percent Change From Preceding Period 2004-01-01 3.647440642727980 2005-01-01 0.853633128349651 2006-01-01 4.027372574595750 2007-01-01 5.246585887045250 2008-01-01 5.006744006212280 2009-01-01 3.040994270509360 2010-01-01 4.129139514145610 2011-01-01 3.910912064668940 2012-01-01 3.209500719270760 2013-01-01 3.132785485196900 2014-01-01 3.534639666730030 2015-01-01 3.417432378102010 2016-01-01 3.759241250021610 2017-01-01 3.393660831040970 2018-01-01 3.515034887922150 2019-01-01 3.595226581206210