Year	Percent
1998-01-01	57.4000
1999-01-01	72.5000
2000-01-01	64.6000
2001-01-01	64.6000
2002-01-01	64.6000
2003-01-01	46.3000
2004-01-01	46.1000
2005-01-01	50.2000
2006-01-01	54.4000
2007-01-01	56.9000
2008-01-01	61.3000
2009-01-01	63.9000
2010-01-01	62.0000
2011-01-01	62.0128
2012-01-01	60.9355
2013-01-01	55.7148
2014-01-01	54.2512
2015-01-01	52.3514
2016-01-01	44.5905