Year Percent 2005-01-01 1.33089995384216 2006-01-01 1.30088996887207 2007-01-01 1.31497001647949 2008-01-01 1.34177005290985 2009-01-01 1.34803998470306 2010-01-01 1.34662997722626 2011-01-01 1.33401000499725 2012-01-01 1.32298994064331 2013-01-01 1.31303000450134 2014-01-01 1.33728003501892