Year	Percent
1993-01-01	6.2703200000000000
1994-01-01	6.1369700000000000
1995-01-01	6.1178400000000000
1996-01-01	5.7200200000000000
1997-01-01	5.7774800000000010
1998-01-01	5.5440100000000000
1999-01-01	5.3558100000000000
2000-01-01	5.2697800000000000
2001-01-01	5.1601099999999995
2002-01-01	5.0955400000000000
2003-01-01	5.1941600000000000
2004-01-01	5.3514400000000000
2005-01-01	5.6129700000000000
2006-01-01	5.4707000000000000
2007-01-01	5.3804500000000000
2008-01-01	5.6564600000000000
2009-01-01	6.2214500000000000
2010-01-01	6.2895300000000000
2011-01-01	6.8283700000000000
2012-01-01	7.0529800000000010
2013-01-01	6.7190900000000000
2014-01-01	7.2065500000000000
2015-01-01	6.8223500000000000
2016-01-01	6.2321599999999995