Year	Percent
1996-01-01	1.7308599999999998
1997-01-01	1.4804800000000000
1998-01-01	1.4838600000000000
1999-01-01	1.6571000000000000
2000-01-01	1.6484000000000000
2001-01-01	1.2815900000000000
2002-01-01	1.3307900000000000
2003-01-01	1.2530700000000001
2004-01-01	1.6319600000000000
2005-01-01	1.7399700000000000
2006-01-01	1.3510200000000000
2007-01-01	1.8950700000000000
2008-01-01	2.0523599999999997
2009-01-01	2.3894200000000000
2010-01-01	2.4395700000000002
2011-01-01	2.6266900000000000
2012-01-01	3.7011500000000000
2013-01-01	3.8580900000000002
2014-01-01	3.7667500000000000
2015-01-01	4.1334000000000000
2016-01-01	3.6825900000000003