Year Percent 2005-01-01 0.70612600000000000 2006-01-01 0.61490300000000000 2007-01-01 0.61490300000000000 2008-01-01 0.61490300000000000 2009-01-01 0.36463600000000000 2010-01-01 0.43506500000000000 2011-01-01 0.39031000000000000 2012-01-01 0.34207900000000000 2013-01-01 0.37135999999999997 2014-01-01 0.32103300000000000