Year	Percent
1996-01-01	8.3552500000000000
1997-01-01	6.6952899999999990
1998-01-01	8.1348700000000000
1999-01-01	6.2003400000000000
2000-01-01	5.2123400000000000
2001-01-01	4.2449000000000000
2002-01-01	4.1385300000000000
2003-01-01	3.6701699999999997
2004-01-01	3.1240500000000000
2005-01-01	2.4673700000000003
2006-01-01	2.3910900000000000
2007-01-01	2.2339100000000000
2008-01-01	2.0077800000000000
2009-01-01	1.9312900000000002
2010-01-01	1.7693000000000000
2011-01-01	1.8024900000000001
2012-01-01	1.8889000000000000
2013-01-01	1.9336200000000001
2014-01-01	1.6166800000000000
2015-01-01	1.0280700000000000
2016-01-01	2.1705099999999997