Year	Percent
1996-01-01	6.3804700000000000
1997-01-01	5.9522400000000000
1998-01-01	4.9573700000000000
1999-01-01	4.8485100000000000
2000-01-01	4.2695099999999995
2001-01-01	9.4775700000000000
2002-01-01	4.2026000000000000
2003-01-01	4.1992199999999995
2004-01-01	3.9262000000000000
2005-01-01	4.2307700000000000
2006-01-01	4.7308100000000000
2007-01-01	4.9360900000000000
2008-01-01	5.5917800000000000
2009-01-01	5.9344800000000010
2010-01-01	6.2186300000000000
2011-01-01	6.0621500000000000
2012-01-01	6.2230300000000005
2013-01-01	5.8085100000000000
2014-01-01	6.1777500000000000
2015-01-01	5.3436400000000000
2016-01-01	6.6604300000000000