Year	Percent
1998-01-01	11.3000
1999-01-01	10.6000
2000-01-01	10.1000
2001-01-01	10.4000
2002-01-01	11.2000
2003-01-01	11.4000
2004-01-01	11.6000
2005-01-01	10.6000
2006-01-01	10.1000
2007-01-01	10.1000
2008-01-01	10.4000
2009-01-01	11.7000
2010-01-01	12.0651
2011-01-01	12.6850
2012-01-01	13.4158
2013-01-01	13.6986
2014-01-01	14.3049
2015-01-01	14.7888
2016-01-01	13.7511