Year	Percent
1996-01-01	54.318600000000000
1997-01-01	55.016500000000000
1998-01-01	55.626000000000005
1999-01-01	62.457500000000000
2000-01-01	61.064200000000000
2001-01-01	59.987800000000000
2002-01-01	57.880000000000000
2003-01-01	57.454500000000000
2004-01-01	55.205100000000000
2005-01-01	54.369600000000000
2006-01-01	53.688100000000000
2007-01-01	55.437500000000000
2008-01-01	53.153100000000000
2009-01-01	57.014600000000000
2010-01-01	57.784900000000000
2011-01-01	57.156800000000000
2012-01-01	55.940100000000000
2013-01-01	54.927900000000000
2014-01-01	54.241300000000000
2015-01-01	54.860700000000000
2016-01-01	53.994300000000000