Year	Percent
1998-01-01	10.3000
1999-01-01	10.8000
2000-01-01	13.2000
2001-01-01	13.0000
2002-01-01	12.2000
2003-01-01	13.0000
2004-01-01	14.2000
2005-01-01	17.1000
2006-01-01	15.4000
2007-01-01	16.0000
2008-01-01	15.4000
2009-01-01	17.2000
2010-01-01	17.3385
2011-01-01	16.8781
2012-01-01	18.0800
2013-01-01	16.9634
2014-01-01	16.9984
2015-01-01	16.8745
2016-01-01	17.5152