Year	Percent
1998-01-01	12.9000
1999-01-01	13.1000
2000-01-01	13.1000
2001-01-01	13.7000
2002-01-01	15.0000
2003-01-01	17.1000
2004-01-01	17.5000
2005-01-01	15.4000
2006-01-01	15.3000
2007-01-01	14.3000
2008-01-01	15.4000
2009-01-01	19.2000
2010-01-01	17.6516
2011-01-01	16.3539
2012-01-01	19.0533
2013-01-01	20.8846
2014-01-01	20.2380
2015-01-01	22.0444
2016-01-01	24.6458