Year	Percent
1996-01-01	4.8780500000000000
1997-01-01	4.7619000000000000
1998-01-01	4.7244100000000000
1999-01-01	3.8668099999999996
2000-01-01	4.6563200000000000
2001-01-01	2.5519800000000000
2002-01-01	3.1634400000000000
2003-01-01	3.1032599999999997
2004-01-01	3.3751200000000000
2005-01-01	3.3044200000000000
2006-01-01	3.3711699999999998
2007-01-01	3.2495600000000000
2008-01-01	3.0878400000000004
2009-01-01	3.9123400000000000
2010-01-01	3.3532200000000000
2011-01-01	3.3262500000000000
2012-01-01	2.9470000000000000
2013-01-01	3.2057700000000002
2014-01-01	2.3425500000000000
2015-01-01	2.6851700000000003
2016-01-01	3.4981800000000005