Year	Percent
1996-01-01	6.2106100000000000
1997-01-01	6.7210199999999990
1998-01-01	5.8605000000000000
1999-01-01	5.9200400000000000
2000-01-01	6.5904399999999990
2001-01-01	6.2966700000000000
2002-01-01	7.6220800000000000
2003-01-01	8.0122500000000000
2004-01-01	7.0588200000000000
2005-01-01	6.1348800000000000
2006-01-01	5.5182300000000000
2007-01-01	5.2326900000000000
2008-01-01	5.0691100000000000
2009-01-01	6.0002900000000010
2010-01-01	5.7643699999999995
2011-01-01	5.7947700000000000
2012-01-01	6.7103300000000000
2013-01-01	6.9387600000000000
2014-01-01	6.1161500000000000
2015-01-01	4.6474100000000000
2016-01-01	5.3448699999999990