Year	Percent
1998-01-01	11.7000
1999-01-01	13.2000
2000-01-01	12.9000
2001-01-01	13.5000
2002-01-01	13.8000
2003-01-01	13.8000
2004-01-01	15.4000
2005-01-01	14.6000
2006-01-01	13.2000
2007-01-01	12.0000
2008-01-01	11.2000
2009-01-01	13.3000
2010-01-01	13.8647
2011-01-01	13.1131
2012-01-01	14.7621
2013-01-01	15.6811
2014-01-01	14.6930
2015-01-01	15.9691
2016-01-01	17.1815