Year	Percent
1996-01-01	4.8047800000000000
1997-01-01	4.8337900000000005
1998-01-01	4.5001300000000000
1999-01-01	5.1749300000000010
2000-01-01	4.0510699999999990
2001-01-01	3.7072800000000004
2002-01-01	2.7744900000000000
2003-01-01	4.2770400000000000
2004-01-01	3.3904900000000002
2005-01-01	3.0805300000000000
2006-01-01	3.1160900000000002
2007-01-01	3.5159400000000000
2008-01-01	3.4134300000000004
2009-01-01	2.9075599999999997
2010-01-01	3.2664900000000000
2011-01-01	3.0570800000000000
2012-01-01	3.3398900000000000
2013-01-01	3.3461700000000000
2014-01-01	2.8399200000000000
2015-01-01	2.4551600000000000
2016-01-01	2.5465000000000000