Year	Percent
1999-01-01	0.56454200000000000
2000-01-01	0.39727300000000000
2001-01-01	0.33110500000000004
2002-01-01	0.33220200000000000
2003-01-01	0.42830400000000000
2004-01-01	0.61413300000000000
2005-01-01	0.61307000000000000
2006-01-01	0.53739600000000000
2007-01-01	0.86822300000000000
2008-01-01	0.67204400000000000
2009-01-01	0.77584500000000000
2010-01-01	1.17703000000000000
2011-01-01	1.67155000000000000
2012-01-01	2.50004000000000030
2013-01-01	2.88419000000000030
2014-01-01	2.56887000000000000
2015-01-01	2.44887000000000000
2016-01-01	2.53565000000000000