Year	Percent
1996-01-01	6.7514699999999990
1997-01-01	4.7628600000000000
1998-01-01	6.4916900000000000
1999-01-01	8.2160800000000000
2000-01-01	6.7965300000000010
2001-01-01	3.7574099999999997
2002-01-01	3.7574099999999997
2003-01-01	3.7574099999999997
2004-01-01	3.7574099999999997
2005-01-01	9.2458600000000000
2006-01-01	6.1131900000000000
2007-01-01	6.7088700000000000
2008-01-01	5.9878100000000000
2009-01-01	6.3760400000000000
2010-01-01	6.4637199999999995
2011-01-01	7.1507600000000010
2012-01-01	6.2804300000000000
2013-01-01	5.2801900000000000
2014-01-01	6.5517199999999995
2015-01-01	6.4220000000000010
2016-01-01	6.8178399999999995