Year Percent 2003-01-01 0.51 2004-01-01 0.39 2005-01-01 0.34 2006-01-01 0.40 2007-01-01 0.40 2008-01-01 0.40 2009-01-01 0.40 2010-01-01 0.40 2011-01-01 0.40 2012-01-01 0.40 2013-01-01 0.40 2014-01-01 0.53