Year	Percent
1996-01-01	56.161200000000000
1997-01-01	49.129200000000000
1998-01-01	42.509900000000000
1999-01-01	47.785500000000000
2000-01-01	46.477900000000000
2001-01-01	44.429600000000000
2002-01-01	47.657700000000000
2003-01-01	49.849300000000000
2004-01-01	50.430600000000000
2005-01-01	52.762100000000000
2006-01-01	51.326500000000000
2007-01-01	51.503400000000000
2008-01-01	48.437700000000000
2009-01-01	59.811800000000000
2010-01-01	52.734700000000000
2011-01-01	55.825900000000000
2012-01-01	59.013999999999996
2013-01-01	51.346000000000004
2014-01-01	51.892700000000000
2015-01-01	50.627500000000000
2016-01-01	49.224600000000000