Year	Percent
1996-01-01	8.4846100000000000
1997-01-01	5.4634900000000000
1998-01-01	7.0673200000000000
1999-01-01	5.1977199999999995
2000-01-01	6.2977400000000000
2001-01-01	6.5384400000000005
2002-01-01	7.2234000000000000
2003-01-01	6.5747200000000000
2004-01-01	5.9591199999999995
2005-01-01	5.7415500000000000
2006-01-01	6.0964400000000000
2007-01-01	5.6133800000000000
2008-01-01	5.9038699999999995
2009-01-01	7.5187899999999990
2010-01-01	5.5025300000000000
2011-01-01	4.6259000000000000
2012-01-01	4.8814000000000000
2013-01-01	5.0452800000000000
2014-01-01	4.1542200000000000
2015-01-01	3.4783500000000000
2016-01-01	3.3963200000000000