Year Percent Change From Preceding Period 2004-01-01 -3.188573360615120 2005-01-01 -6.777638091631150 2006-01-01 0.388004824776087 2007-01-01 -8.878204023905580 2008-01-01 1.285630711666980 2009-01-01 2.725843771866050 2010-01-01 3.285152548922020 2011-01-01 3.589335099809340 2012-01-01 3.744587233662120 2013-01-01 3.348158657344360 2014-01-01 3.195735104957450 2015-01-01 3.064124929496100 2016-01-01 2.480615625789630 2017-01-01 1.798061573096470 2018-01-01 2.137388445006830 2019-01-01 2.430886687664830