Year	Percent
1996-01-01	59.676300000000000
1997-01-01	51.941500000000000
1998-01-01	49.604500000000000
1999-01-01	47.123900000000000
2000-01-01	45.275600000000000
2001-01-01	60.059800000000000
2002-01-01	77.002300000000000
2003-01-01	84.233700000000000
2004-01-01	79.393500000000000
2005-01-01	77.878600000000000
2006-01-01	76.876500000000000
2007-01-01	73.572900000000000
2008-01-01	71.246500000000000
2009-01-01	69.975700000000000
2010-01-01	67.054900000000000
2011-01-01	64.675200000000000
2012-01-01	59.504800000000000
2013-01-01	57.060900000000000
2014-01-01	55.380200000000000
2015-01-01	54.535800000000000
2016-01-01	52.916000000000004