Year	Percent
1995-01-01	6.9
1996-01-01	6.7
1997-01-01	7.7
1998-01-01	8.5
1999-01-01	8.9
2000-01-01	8.8
2001-01-01	9.3
2002-01-01	10.3
2003-01-01	10.7
2004-01-01	10.4
2005-01-01	9.0
2006-01-01	8.4
2007-01-01	7.3
2008-01-01	6.1
2009-01-01	7.5
2010-01-01	6.7
2011-01-01	5.6