Year	Percent
1996-01-01	3.7433199999999998
1997-01-01	3.4443200000000000
1998-01-01	3.7924200000000000
1999-01-01	3.3179700000000000
2000-01-01	4.5351500000000000
2001-01-01	4.3269199999999990
2002-01-01	3.1779700000000000
2003-01-01	2.7131800000000000
2004-01-01	1.8400000000000000
2005-01-01	2.1519800000000000
2006-01-01	2.9703000000000000
2007-01-01	3.2266900000000000
2008-01-01	3.0032799999999997
2009-01-01	2.5270799999999998
2010-01-01	2.0963400000000000
2011-01-01	1.3880100000000000
2012-01-01	1.1072400000000000
2013-01-01	0.6619940000000000
2014-01-01	1.1395000000000000
2015-01-01	1.0965100000000000
2016-01-01	1.2600700000000000