Year Percent Change From Preceding Period 2004-01-01 11.65323165551110 2005-01-01 18.28398028971520 2006-01-01 -4.59345383794640 2007-01-01 -6.31038821139883 2008-01-01 18.42805108175710 2009-01-01 11.71117089475360 2010-01-01 16.12918206364900 2011-01-01 13.79416721414490 2012-01-01 1.55529115271272 2013-01-01 5.61622233537167 2014-01-01 14.57992043061080 2015-01-01 5.31250000000000 2016-01-01 5.75008242664029 2017-01-01 10.30301251884430 2018-01-01 8.63714008858265 2019-01-01 8.68341188962204