Year	Percent
1997-01-01	3.7891500000000000
1998-01-01	3.7891500000000000
1999-01-01	3.7891500000000000
2000-01-01	3.7891500000000000
2001-01-01	2.6097300000000000
2002-01-01	2.5631200000000000
2003-01-01	1.3530600000000000
2004-01-01	1.7932700000000001
2005-01-01	2.6994000000000000
2006-01-01	2.4668900000000002
2007-01-01	4.3097800000000000
2008-01-01	2.6443700000000000
2009-01-01	3.0069700000000000
2010-01-01	2.9787100000000000
2011-01-01	4.5590699999999990
2012-01-01	4.2860700000000000
2013-01-01	3.3688400000000000
2014-01-01	2.7238599999999997
2015-01-01	1.8518200000000000
2016-01-01	0.9227040000000001