Year Percent Change From Preceding Period 2004-01-01 9.06700672808964 2005-01-01 11.14768867853800 2006-01-01 9.37375939379367 2007-01-01 10.26420419485820 2008-01-01 6.18144276680903 2009-01-01 4.21730675741355 2010-01-01 16.61807580174920 2011-01-01 5.45999999999963 2012-01-01 2.18092167646533 2013-01-01 2.96028210838886 2014-01-01 1.09959441189728 2015-01-01 11.09922439154840 2016-01-01 21.09999999999990 2017-01-01 7.16175531429644 2018-01-01 6.49999999999988 2019-01-01 5.49999999999984