Year	Percent
1996-01-01	2.9894300000000000
1997-01-01	2.9479200000000000
1998-01-01	3.0298200000000000
1999-01-01	2.9095100000000000
2000-01-01	2.8049100000000000
2001-01-01	2.4626000000000000
2002-01-01	2.3263900000000000
2003-01-01	2.2496900000000000
2004-01-01	2.3303000000000000
2005-01-01	1.9753700000000000
2006-01-01	2.2004599999999996
2007-01-01	2.1334299999999997
2008-01-01	2.1540200000000000
2009-01-01	1.4982100000000000
2010-01-01	1.3614200000000000
2011-01-01	1.3121700000000000
2012-01-01	1.0417600000000000
2013-01-01	1.5460600000000000
2014-01-01	1.5674400000000000
2015-01-01	1.8372800000000000
2016-01-01	1.3512500000000000