Year Percent Change From Preceding Period 2004-01-01 2.94642187129168 2005-01-01 3.22953628096091 2006-01-01 3.60170691032492 2007-01-01 1.74607918643716 2008-01-01 6.42934983457958 2009-01-01 2.23134332899663 2010-01-01 5.21041993083563 2011-01-01 11.20461331619440 2012-01-01 6.56877631981511 2013-01-01 4.63786804936057 2014-01-01 1.39568466416844 2015-01-01 1.24744643860310 2016-01-01 1.13673857882618 2017-01-01 5.73585448655692 2018-01-01 3.64332868349354 2019-01-01 4.91607703737565