Year	Percent
1998-01-01	9.6000
1999-01-01	11.9000
2000-01-01	11.7000
2001-01-01	10.8000
2002-01-01	9.4000
2003-01-01	11.1000
2004-01-01	11.6000
2005-01-01	12.5000
2006-01-01	12.5000
2007-01-01	13.3000
2008-01-01	11.3000
2009-01-01	11.2000
2010-01-01	13.8892
2011-01-01	14.2393
2012-01-01	14.2494
2013-01-01	15.9061
2014-01-01	15.2678
2015-01-01	15.9442
2016-01-01	16.1963