Year	Percent
1996-01-01	7.2861400000000000
1997-01-01	6.5638500000000000
1998-01-01	5.9024000000000000
1999-01-01	4.9455200000000000
2000-01-01	5.3884700000000000
2001-01-01	4.6001400000000010
2002-01-01	4.8679200000000000
2003-01-01	4.5273100000000000
2004-01-01	5.3352200000000000
2005-01-01	4.9465500000000000
2006-01-01	4.9100900000000000
2007-01-01	4.5805099999999990
2008-01-01	4.2622100000000000
2009-01-01	4.3456600000000000
2010-01-01	4.2565000000000000
2011-01-01	3.8672000000000000
2012-01-01	4.3228500000000000
2013-01-01	3.5414300000000000
2014-01-01	3.2904600000000000
2015-01-01	3.1047400000000000
2016-01-01	3.9881599999999997