Year	Percent
1996-01-01	5.9456300000000000
1997-01-01	5.2281400000000000
1998-01-01	5.6159500000000000
1999-01-01	4.9814300000000005
2000-01-01	3.9710600000000000
2001-01-01	4.9498400000000000
2002-01-01	5.2100800000000005
2003-01-01	4.6445000000000000
2004-01-01	5.1565300000000000
2005-01-01	4.6849400000000000
2006-01-01	5.2234500000000000
2007-01-01	4.5769900000000000
2008-01-01	7.5839100000000000
2009-01-01	4.9842100000000000
2010-01-01	4.8776400000000000
2011-01-01	4.7113100000000000
2012-01-01	4.7261600000000000
2013-01-01	4.7371500000000000
2014-01-01	4.7277600000000000
2015-01-01	4.5670600000000000
2016-01-01	4.8296199999999990