Year Percent 1989-01-01 0.01752800000000000 1990-01-01 0.02462200000000000 1991-01-01 0.03212400000000000 1992-01-01 0.03397700000000000 1993-01-01 0.16505899999999998 1994-01-01 0.19297999999999998 1995-01-01 0.20518699999999998 1996-01-01 0.56313800000000000 1997-01-01 1.14254000000000000 1998-01-01 1.68060000000000000 1999-01-01 0.98558300000000000 2000-01-01 0.42339600000000000 2001-01-01 0.37169600000000000 2002-01-01 0.81587000000000000 2003-01-01 0.93481800000000000 2004-01-01 1.79737000000000010 2005-01-01 1.70291000000000000 2006-01-01 1.96023000000000000 2007-01-01 6.25543000000000050 2008-01-01 8.64703000000000000 2009-01-01 5.39881000000000000 2010-01-01 1.30237999999999990 2011-01-01 1.08712000000000000 2012-01-01 0.86996900000000010 2013-01-01 0.99795400000000010 2014-01-01 1.00286000000000000 2015-01-01 0.85823100000000000 2016-01-01 0.61281500000000000 2017-01-01 0.45993400000000000