Year	Percent
1998-01-01	11.1000
1999-01-01	11.5000
2000-01-01	11.6000
2001-01-01	14.7000
2002-01-01	13.4000
2003-01-01	9.3000
2004-01-01	13.9000
2005-01-01	16.2000
2006-01-01	15.8000
2007-01-01	15.7000
2008-01-01	13.8000
2009-01-01	18.2000
2010-01-01	19.1330
2011-01-01	17.4095
2012-01-01	18.5587
2013-01-01	18.4543
2014-01-01	17.9264
2015-01-01	17.8067
2016-01-01	17.7549