Year	Percent
1996-01-01	1.6457800000000000
1997-01-01	1.4701000000000000
1998-01-01	1.4983300000000000
1999-01-01	1.2682700000000000
2000-01-01	1.6610099999999999
2001-01-01	1.6988800000000000
2002-01-01	1.7733000000000000
2003-01-01	1.8412900000000000
2004-01-01	2.0441599999999998
2005-01-01	1.8292099999999998
2006-01-01	2.0961200000000000
2007-01-01	2.2129500000000000
2008-01-01	2.0436900000000002
2009-01-01	1.5305200000000000
2010-01-01	1.6815900000000001
2011-01-01	1.6488099999999999
2012-01-01	2.1557500000000000
2013-01-01	2.3664200000000000
2014-01-01	1.7387200000000000
2015-01-01	1.7656000000000000
2016-01-01	1.5120700000000000