Year	Percent
1998-01-01	2.0000000000000000
1999-01-01	1.6000000000000000
2000-01-01	1.2000000000000000
2001-01-01	1.2000000000000000
2002-01-01	1.1000000000000000
2003-01-01	1.0000000000000000
2004-01-01	0.8000000000000000
2005-01-01	0.8000000000000000
2006-01-01	0.7000000000000000
2007-01-01	0.9000000000000000
2008-01-01	2.8000000000000000
2009-01-01	4.1000000000000000
2010-01-01	4.6683699999999995
2011-01-01	6.0072800000000010
2012-01-01	7.4839000000000000
2013-01-01	9.3807300000000000
2014-01-01	8.4527800000000000
2015-01-01	6.1623800000000010
2016-01-01	5.6352500000000000