Year	Percent
1996-01-01	5.4606800000000000
1997-01-01	4.6899700000000000
1998-01-01	6.4727200000000000
1999-01-01	8.8479000000000000
2000-01-01	8.0115800000000000
2001-01-01	7.2189200000000000
2002-01-01	6.2047800000000000
2003-01-01	5.7187199999999990
2004-01-01	6.7720899999999995
2005-01-01	8.1989600000000010
2006-01-01	8.0764199999999990
2007-01-01	8.2068100000000000
2008-01-01	6.3313100000000000
2009-01-01	5.4966900000000000
2010-01-01	5.5799900000000004
2011-01-01	5.0498100000000000
2012-01-01	5.9116800000000005
2013-01-01	5.8948199999999990
2014-01-01	5.7084500000000000
2015-01-01	3.8967099999999997
2016-01-01	4.6724700000000000