Year	Percent
1996-01-01	6.9354700000000000
1997-01-01	5.1527100000000000
1998-01-01	6.1360800000000010
1999-01-01	5.4296200000000000
2000-01-01	4.7850000000000000
2001-01-01	4.3688900000000000
2002-01-01	5.5370000000000010
2003-01-01	5.2317300000000010
2004-01-01	4.8158400000000010
2005-01-01	3.8629200000000000
2006-01-01	3.6806400000000004
2007-01-01	3.9207400000000003
2008-01-01	3.4392000000000000
2009-01-01	3.5511900000000000
2010-01-01	3.1414400000000002
2011-01-01	3.0142400000000000
2012-01-01	3.0117800000000000
2013-01-01	2.7951599999999996
2014-01-01	2.4335000000000000
2015-01-01	2.2461000000000000
2016-01-01	2.2201200000000000