Year	Percent
1993-01-01	4.0
1994-01-01	3.8
1995-01-01	3.9
1996-01-01	4.3
1997-01-01	4.4
1998-01-01	4.5
1999-01-01	3.9
2000-01-01	3.6
2001-01-01	3.6
2002-01-01	4.2
2003-01-01	4.3
2004-01-01	4.9
2005-01-01	5.2
2006-01-01	4.7
2007-01-01	4.4
2008-01-01	3.8
2009-01-01	4.8
2010-01-01	4.4
2011-01-01	4.1