Year	Percent
1999-01-01	12.7000
2000-01-01	11.9000
2001-01-01	12.1000
2002-01-01	11.5000
2003-01-01	11.9000
2004-01-01	11.5000
2005-01-01	11.3000
2006-01-01	10.9000
2007-01-01	10.2000
2008-01-01	10.5000
2009-01-01	12.4000
2010-01-01	12.6707
2011-01-01	12.3243
2012-01-01	14.4967
2013-01-01	15.3844
2014-01-01	16.3486
2015-01-01	17.1002
2016-01-01	17.5588