Year Percent 2004-01-01 1.19381000000000000 2005-01-01 1.10945000000000000 2006-01-01 0.86918100000000000 2007-01-01 0.78066600000000000 2008-01-01 0.77132900000000000 2009-01-01 0.57434400000000000 2010-01-01 0.53499700000000010 2011-01-01 0.49004600000000000 2012-01-01 0.46518699999999996 2013-01-01 0.44343699999999997 2014-01-01 0.44343699999999997 2015-01-01 0.31682100000000000 2016-01-01 0.30921000000000000