Year	Percent
1995-01-01	14.042300000000000
1996-01-01	13.986600000000000
1997-01-01	13.750900000000000
1998-01-01	12.901600000000000
1999-01-01	14.704300000000000
2000-01-01	15.781400000000000
2001-01-01	16.859900000000000
2002-01-01	18.654000000000000
2003-01-01	17.122700000000000
2004-01-01	17.915800000000000
2005-01-01	19.379400000000000
2006-01-01	20.477999999999998
2007-01-01	22.752500000000000
2008-01-01	16.423100000000000
2009-01-01	12.596900000000000
2010-01-01	12.294900000000000
2011-01-01	12.424600000000000
2012-01-01	12.812000000000001
2013-01-01	15.097900000000000
2014-01-01	16.349800000000000
2015-01-01	16.472300000000000
2016-01-01	15.998000000000000
2017-01-01	17.375800000000000