Year	Percent
1998-01-01	58.5000
1999-01-01	60.7000
2000-01-01	60.8000
2001-01-01	59.9000
2002-01-01	60.4000
2003-01-01	59.6000
2004-01-01	61.3000
2005-01-01	61.3000
2006-01-01	61.3000
2007-01-01	61.3000
2008-01-01	70.0000
2009-01-01	63.2000
2010-01-01	63.5828
2011-01-01	59.0194
2012-01-01	56.8924
2013-01-01	55.9218
2014-01-01	51.0524
2015-01-01	51.1776
2016-01-01	50.3912