Year	Percent
1998-01-01	10.7000
1999-01-01	11.1000
2000-01-01	11.1000
2001-01-01	11.1000
2002-01-01	13.5000
2003-01-01	13.8000
2004-01-01	13.4000
2005-01-01	11.5000
2006-01-01	11.5000
2007-01-01	10.6000
2008-01-01	12.4000
2009-01-01	16.1000
2010-01-01	16.0065
2011-01-01	17.1921
2012-01-01	18.8772
2013-01-01	19.2353
2014-01-01	18.2095
2015-01-01	19.8163
2016-01-01	20.7451