Year Percent Change From Preceding Period 2004-01-01 13.251691627579300 2005-01-01 9.344846321829780 2006-01-01 10.432268369046000 2007-01-01 10.699128900189400 2008-01-01 10.491405313358600 2009-01-01 10.003137975492800 2010-01-01 12.404816198008000 2011-01-01 5.343573436510200 2012-01-01 5.879343648782310 2013-01-01 8.268633956251350 2014-01-01 7.262945694264700 2015-01-01 3.584123631018140 2016-01-01 -0.269997198163795 2017-01-01 0.456365952409550 2018-01-01 1.597656365095120 2019-01-01 1.908877070151410