Year Percent Change From Preceding Period 2004-01-01 11.79198046060310 2005-01-01 4.91195588583112 2006-01-01 7.31582837017794 2007-01-01 5.60037454239619 2008-01-01 15.47837425080960 2009-01-01 8.01569672514756 2010-01-01 5.76510951701002 2011-01-01 18.93390118076460 2012-01-01 3.20035329604756 2013-01-01 7.14850485622613 2014-01-01 6.01887611352071 2015-01-01 8.00702139418313 2016-01-01 6.34957244308985 2017-01-01 4.49558129896535 2018-01-01 6.88050226334497 2019-01-01 4.99984690452361