Year	Percent
1998-01-01	11.2000
1999-01-01	12.0000
2000-01-01	12.9000
2001-01-01	12.8000
2002-01-01	12.5000
2003-01-01	13.3000
2004-01-01	14.0000
2005-01-01	12.0000
2006-01-01	12.5000
2007-01-01	11.7000
2008-01-01	11.9000
2009-01-01	13.5000
2010-01-01	13.9621
2011-01-01	13.6718
2012-01-01	14.3953
2013-01-01	13.9430
2014-01-01	14.2398
2015-01-01	14.3236
2016-01-01	15.0761