Year Percent 1996-01-01 1.77477000000000020 1997-01-01 1.28088999999999990 1998-01-01 1.49858000000000000 1999-01-01 1.27754000000000000 2000-01-01 1.26688000000000000 2001-01-01 0.69549500000000000 2002-01-01 0.46654500000000000 2003-01-01 0.93065200000000000 2004-01-01 1.59037000000000000 2005-01-01 0.82971100000000010 2006-01-01 0.84799500000000000 2007-01-01 0.84727600000000000 2008-01-01 0.66581499999999990 2009-01-01 0.63651800000000000 2010-01-01 0.55446300000000000 2011-01-01 0.46381100000000000 2012-01-01 0.45203400000000000 2013-01-01 0.53597600000000000 2014-01-01 0.49305699999999997 2015-01-01 0.44063500000000005 2016-01-01 0.37053000000000000