Year	Percent
1998-01-01	14.4000
1999-01-01	16.2000
2000-01-01	13.8000
2001-01-01	13.9000
2002-01-01	15.7000
2003-01-01	14.2000
2004-01-01	14.1000
2005-01-01	14.3000
2006-01-01	16.1000
2007-01-01	15.9000
2008-01-01	15.3000
2009-01-01	16.5000
2010-01-01	16.8611
2011-01-01	15.6698
2012-01-01	15.9475
2013-01-01	15.5987
2014-01-01	15.7546
2015-01-01	14.9604
2016-01-01	14.7316