Year Percent 1994-01-01 0.10608699999999999 1995-01-01 0.09826900000000001 1996-01-01 0.10981900000000000 1997-01-01 0.17005100000000000 1998-01-01 0.24953899999999998 1999-01-01 0.24316200000000000 2000-01-01 0.30387800000000004 2001-01-01 0.31151799999999996 2002-01-01 0.35074200000000000 2003-01-01 0.40862000000000000 2004-01-01 0.51465600000000000 2005-01-01 0.70551600000000000 2006-01-01 0.72066800000000000 2007-01-01 0.75381899999999990 2008-01-01 0.48107900000000000 2009-01-01 0.51298700000000000 2010-01-01 0.51480500000000010 2011-01-01 0.38985300000000000 2012-01-01 0.35969700000000000 2013-01-01 0.36864600000000003 2014-01-01 0.38815100000000000 2015-01-01 0.38183700000000000 2016-01-01 0.38880400000000000