Year	Percent
1998-01-01	10.9000
1999-01-01	12.4000
2000-01-01	11.3000
2001-01-01	13.3000
2002-01-01	13.0000
2003-01-01	13.4000
2004-01-01	12.4000
2005-01-01	13.2000
2006-01-01	13.6000
2007-01-01	14.8000
2008-01-01	13.9000
2009-01-01	15.8000
2010-01-01	16.0789
2011-01-01	14.8155
2012-01-01	16.1722
2013-01-01	15.4614
2014-01-01	16.5222
2015-01-01	17.1140
2016-01-01	17.7586