Year	Percent
1998-01-01	7.5000
1999-01-01	11.4000
2000-01-01	12.3000
2001-01-01	12.3000
2002-01-01	12.3000
2003-01-01	12.3000
2004-01-01	12.3000
2005-01-01	12.3000
2006-01-01	13.5000
2007-01-01	12.9000
2008-01-01	14.3000
2009-01-01	14.7000
2010-01-01	15.2967
2011-01-01	15.2509
2012-01-01	14.9723
2013-01-01	14.8434
2014-01-01	14.9493
2015-01-01	14.3827
2016-01-01	14.1384