Year	Percent
1993-01-01	7.0383300000000000
1994-01-01	6.0483300000000000
1995-01-01	5.8375000000000000
1996-01-01	5.7508300000000006
1997-01-01	5.4895800000000000
1998-01-01	4.7279200000000000
1999-01-01	4.2040800000000000
2000-01-01	3.7405000000000000
2001-01-01	4.3230800000000000
2002-01-01	4.7266699999999995
2003-01-01	4.6158300000000000
2004-01-01	4.7441699999999996
2005-01-01	4.6025000000000000
2006-01-01	4.4078000000000000
2007-01-01	4.4646900000000000
2008-01-01	4.6396800000000000
2009-01-01	4.7249400000000000
2010-01-01	4.8062500000000000
2011-01-01	4.6795800000000005
2012-01-01	4.3824200000000000
2013-01-01	4.1083400000000000
2014-01-01	3.9434099999999996
2015-01-01	3.7532000000000000
2016-01-01	3.5341300000000000