Year	Percent
1998-01-01	10.0000
1999-01-01	9.6000
2000-01-01	9.6000
2001-01-01	9.3000
2002-01-01	9.3000
2003-01-01	8.8000
2004-01-01	8.0000
2005-01-01	8.8000
2006-01-01	9.3000
2007-01-01	9.9000
2008-01-01	10.1000
2009-01-01	14.0000
2010-01-01	12.2286
2011-01-01	12.0102
2012-01-01	12.6535
2013-01-01	13.5433
2014-01-01	13.6773
2015-01-01	13.9026
2016-01-01	14.7982