Year Percent 1992-01-01 0.31594400000000000 1993-01-01 0.31082700000000000 1994-01-01 0.27448100000000000 1995-01-01 0.29585300000000003 1996-01-01 0.32222700000000000 1997-01-01 0.40699000000000000 1998-01-01 0.40661500000000000 1999-01-01 0.63470100000000010 2000-01-01 0.61338500000000010 2001-01-01 0.77979600000000000 2002-01-01 1.11030000000000000 2003-01-01 1.37228000000000000 2004-01-01 1.25984000000000000 2005-01-01 1.15837000000000010 2006-01-01 1.13512000000000010 2007-01-01 1.07429000000000000 2008-01-01 1.02738000000000000 2009-01-01 1.09991000000000000 2010-01-01 0.95017600000000000 2011-01-01 0.91566900000000010 2012-01-01 0.97043200000000000 2013-01-01 0.97724400000000000 2014-01-01 0.97918700000000000 2015-01-01 0.86957900000000010 2016-01-01 0.83784200000000000