Year	Percent
1998-01-01	10.7000
1999-01-01	8.9000
2000-01-01	12.9000
2001-01-01	12.9000
2002-01-01	12.9000
2003-01-01	11.8000
2004-01-01	11.9000
2005-01-01	11.9000
2006-01-01	11.9000
2007-01-01	12.0000
2008-01-01	11.2000
2009-01-01	12.0000
2010-01-01	13.5529
2011-01-01	13.2623
2012-01-01	13.5517
2013-01-01	14.2935
2014-01-01	14.2468
2015-01-01	14.4144
2016-01-01	14.2983