Year	Percent
1998-01-01	11.9000
1999-01-01	13.3000
2000-01-01	13.3000
2001-01-01	13.3000
2002-01-01	13.3000
2003-01-01	13.3000
2004-01-01	13.3000
2005-01-01	13.3000
2006-01-01	15.8000
2007-01-01	13.3000
2008-01-01	15.3000
2009-01-01	15.4000
2010-01-01	15.9994
2011-01-01	15.6622
2012-01-01	17.0901
2013-01-01	17.2956
2014-01-01	17.0795
2015-01-01	18.3831
2016-01-01	18.2358