Year	Percent
1996-01-01	4.9644699999999995
1997-01-01	4.5985900000000000
1998-01-01	4.7373000000000000
1999-01-01	4.2349100000000000
2000-01-01	4.3945700000000000
2001-01-01	4.1668600000000000
2002-01-01	4.9370400000000005
2003-01-01	4.5456699999999990
2004-01-01	5.0930599999999995
2005-01-01	4.2247600000000000
2006-01-01	4.5194400000000000
2007-01-01	3.9684800000000005
2008-01-01	3.5395700000000000
2009-01-01	3.3657300000000000
2010-01-01	3.5275000000000000
2011-01-01	3.4316699999999996
2012-01-01	3.1614500000000000
2013-01-01	3.4156500000000000
2014-01-01	3.3053500000000000
2015-01-01	2.4810600000000000
2016-01-01	3.2255700000000003