Year	Percent
2000-01-01	18.1000
2001-01-01	17.8000
2002-01-01	18.5000
2003-01-01	13.3000
2004-01-01	12.6000
2005-01-01	11.9000
2006-01-01	16.8000
2007-01-01	18.6000
2008-01-01	17.4000
2009-01-01	18.7000
2010-01-01	20.2383
2011-01-01	16.2000
2012-01-01	18.3900
2013-01-01	19.1000
2014-01-01	20.8000
2015-01-01	18.8000