Year	Percent
1996-01-01	5.5816300000000005
1997-01-01	5.4177300000000010
1998-01-01	4.8258600000000000
1999-01-01	3.1788700000000000
2000-01-01	4.1289400000000000
2001-01-01	3.8928900000000000
2002-01-01	3.3540699999999997
2003-01-01	4.0068400000000000
2004-01-01	4.0018900000000000
2005-01-01	4.2119400000000000
2006-01-01	3.5513800000000004
2007-01-01	4.3970500000000000
2008-01-01	3.7280000000000000
2009-01-01	3.7524500000000000
2010-01-01	4.3661699999999990
2011-01-01	4.4516300000000010
2012-01-01	3.6975400000000000
2013-01-01	4.3915200000000000
2014-01-01	4.2431100000000000
2015-01-01	4.3882900000000005
2016-01-01	3.9290199999999995