Year Percent 2004-01-01 1.94 2005-01-01 1.17 2006-01-01 1.17 2007-01-01 1.19 2008-01-01 1.27 2009-01-01 1.79 2010-01-01 1.91 2011-01-01 1.87 2012-01-01 1.72 2013-01-01 2.01 2014-01-01 2.07