Year	Percent
1998-01-01	9.6000
1999-01-01	10.9000
2000-01-01	10.9000
2001-01-01	9.4000
2002-01-01	11.0000
2003-01-01	11.6000
2004-01-01	12.1000
2005-01-01	14.0000
2006-01-01	13.3000
2007-01-01	12.9000
2008-01-01	12.6000
2009-01-01	14.2000
2010-01-01	14.2454
2011-01-01	14.2993
2012-01-01	14.7162
2013-01-01	14.7615
2014-01-01	14.8804
2015-01-01	14.0629
2016-01-01	16.1946