Year Percent 2005-01-01 0.36107300000000000 2006-01-01 0.36107300000000000 2007-01-01 0.36107300000000000 2008-01-01 0.29651800000000000 2009-01-01 0.34603000000000000 2010-01-01 0.34720900000000000 2011-01-01 0.33449600000000000 2012-01-01 0.46680200000000005 2013-01-01 0.55874600000000000 2014-01-01 0.65826100000000000