Year	Percent
1996-01-01	8.7494900000000000
1997-01-01	9.3959700000000000
1998-01-01	8.4656100000000000
1999-01-01	6.2153500000000000
2000-01-01	6.1339000000000000
2001-01-01	7.6744200000000000
2002-01-01	5.9622500000000000
2003-01-01	5.9368800000000000
2004-01-01	5.4156800000000000
2005-01-01	4.6313100000000000
2006-01-01	4.2275700000000000
2007-01-01	3.8593699999999997
2008-01-01	3.8438000000000000
2009-01-01	3.3636000000000000
2010-01-01	3.1881200000000000
2011-01-01	3.0958799999999997
2012-01-01	2.9532400000000000
2013-01-01	3.1112200000000000
2014-01-01	2.9116800000000000
2015-01-01	3.3047900000000000
2016-01-01	2.4081099999999998