Year	Percent
1996-01-01	9.3920200000000000
1997-01-01	7.5311500000000000
1998-01-01	4.4750900000000000
1999-01-01	9.5799899999999990
2000-01-01	9.4650500000000000
2001-01-01	8.1918600000000000
2002-01-01	6.7406100000000000
2003-01-01	6.3995800000000000
2004-01-01	7.6696100000000005
2005-01-01	6.1531100000000000
2006-01-01	5.5599200000000000
2007-01-01	5.2418500000000000
2008-01-01	4.9552600000000000
2009-01-01	4.2147600000000000
2010-01-01	5.2011800000000000
2011-01-01	4.9012500000000000
2012-01-01	3.9815199999999997
2013-01-01	3.3370500000000000
2014-01-01	2.7734900000000002
2015-01-01	2.0471800000000000
2016-01-01	3.9116300000000000