Year	Percent
1996-01-01	1.5913500000000000
1997-01-01	1.3838900000000000
1998-01-01	1.0103600000000001
1999-01-01	1.3452600000000001
2000-01-01	2.0133700000000000
2001-01-01	1.9773200000000000
2002-01-01	3.3322700000000000
2003-01-01	2.9438800000000000
2004-01-01	2.5790700000000000
2005-01-01	1.8265700000000000
2006-01-01	1.8224400000000000
2007-01-01	2.0068300000000000
2008-01-01	1.6118700000000001
2009-01-01	1.5716900000000000
2010-01-01	4.3991900000000000
2011-01-01	3.3004200000000000
2012-01-01	1.8592300000000000
2013-01-01	1.8173700000000002
2014-01-01	1.8154200000000000
2015-01-01	1.7039200000000000
2016-01-01	1.7645000000000000