Year	Percent
1996-01-01	6.1855699999999990
1997-01-01	6.9767399999999995
1998-01-01	6.9767399999999995
1999-01-01	8.9887600000000010
2000-01-01	8.9887600000000010
2001-01-01	8.4210500000000000
2002-01-01	4.6875000000000000
2003-01-01	3.9735099999999997
2004-01-01	4.1379300000000000
2005-01-01	4.2253500000000000
2006-01-01	5.7971000000000000
2007-01-01	5.9259300000000000
2008-01-01	5.7971000000000000
2009-01-01	6.1068700000000000
2010-01-01	8.1300800000000000
2011-01-01	8.4033600000000010
2012-01-01	8.2644600000000000
2013-01-01	7.7519399999999990
2014-01-01	7.5757600000000010
2015-01-01	5.4193000000000000
2016-01-01	4.6953500000000000