Year	Percent
1996-01-01	2.5547299999999997
1997-01-01	2.2352100000000000
1998-01-01	5.6539800000000010
1999-01-01	1.4484900000000000
2000-01-01	1.2014000000000000
2001-01-01	1.4436500000000000
2002-01-01	2.1848799999999997
2003-01-01	2.0314500000000000
2004-01-01	2.0932900000000000
2005-01-01	1.9476300000000000
2006-01-01	2.1293100000000000
2007-01-01	2.4575900000000000
2008-01-01	2.1031500000000000
2009-01-01	3.7906100000000000
2010-01-01	3.3473000000000000
2011-01-01	2.7532000000000000
2012-01-01	2.7427099999999998
2013-01-01	2.4454400000000000
2014-01-01	2.3681400000000004
2015-01-01	2.2367600000000000
2016-01-01	2.3842200000000000