Year	Percent
1996-01-01	4.1533400000000000
1997-01-01	3.4102400000000000
1998-01-01	3.8259800000000004
1999-01-01	3.4889500000000000
2000-01-01	4.0938800000000000
2001-01-01	5.0939999999999990
2002-01-01	4.6801800000000000
2003-01-01	6.0294700000000000
2004-01-01	4.3726600000000000
2005-01-01	4.2086300000000000
2006-01-01	4.7414900000000000
2007-01-01	4.7900900000000000
2008-01-01	4.5069700000000000
2009-01-01	4.2587800000000010
2010-01-01	3.7758599999999998
2011-01-01	4.1757000000000000
2012-01-01	2.8472700000000000
2013-01-01	2.3303800000000000
2014-01-01	1.1622100000000000
2015-01-01	2.6020300000000000
2016-01-01	1.6528200000000002