Year Percent 1995-01-01 0.26575800000000000 1996-01-01 0.22597600000000000 1997-01-01 0.17511500000000002 1998-01-01 0.23858600000000002 1999-01-01 0.19372799999999998 2000-01-01 0.24639200000000000 2001-01-01 0.52587600000000000 2002-01-01 0.43147700000000005 2003-01-01 0.43035200000000007 2004-01-01 0.57838100000000000 2005-01-01 0.85562100000000000 2006-01-01 1.18337000000000000 2007-01-01 1.02792000000000020 2008-01-01 0.86522999999999990 2009-01-01 1.00297000000000010 2010-01-01 1.13262000000000020 2011-01-01 0.83276100000000010 2012-01-01 0.66520400000000000 2013-01-01 0.46093900000000004 2014-01-01 0.34603900000000000 2015-01-01 0.23952199999999998 2016-01-01 0.17398000000000000