Year	Percent
1996-01-01	6.2926000000000000
1997-01-01	5.9221000000000000
1998-01-01	5.1711300000000010
1999-01-01	5.0612200000000000
2000-01-01	5.6813199999999995
2001-01-01	5.1988199999999996
2002-01-01	5.2935400000000000
2003-01-01	4.6877100000000000
2004-01-01	4.6985600000000000
2005-01-01	4.6059100000000000
2006-01-01	3.8026800000000005
2007-01-01	4.5284600000000000
2008-01-01	4.1153500000000000
2009-01-01	4.2268200000000000
2010-01-01	4.3499400000000000
2011-01-01	4.4700300000000000
2012-01-01	4.0493900000000000
2013-01-01	4.0008099999999995
2014-01-01	3.9326700000000000
2015-01-01	3.8943100000000000
2016-01-01	3.8627000000000000