Year	Percent
1998-01-01	11.3000
1999-01-01	11.3000
2000-01-01	12.7000
2001-01-01	12.4000
2002-01-01	12.6000
2003-01-01	12.4000
2004-01-01	12.6000
2005-01-01	12.4000
2006-01-01	13.4000
2007-01-01	12.1000
2008-01-01	15.0000
2009-01-01	17.5000
2010-01-01	17.0552
2011-01-01	16.5894
2012-01-01	16.8736
2013-01-01	17.4543
2014-01-01	16.6322
2015-01-01	17.0447
2016-01-01	16.7820