Quarter	Percent
1999-03-31	3.3
1999-06-30	6.7
1999-09-30	5.2
1999-12-31	14.4
2000-03-31	11.6
2000-06-30	12.7
2000-09-30	20.5
2000-12-31	11.2
2001-03-31	10.9
2001-06-30	11
2001-09-30	4.6
2001-12-31	6.4
2002-03-31	4.9
2002-06-30	1.7
2002-09-30	6.4
2002-12-31	7.3
2003-03-31	8.5
2003-06-30	9.1
2003-09-30	6.9
2003-12-31	8.9
2004-03-31	10.6
2004-06-30	12.3
2004-09-30	11
2004-12-31	6.8
2005-03-31	7.4
2005-06-30	6.2
2005-09-30	4.4
2005-12-31	8.6
2006-03-31	11.4
2006-06-30	11.4
2006-09-30	14.1
2006-12-31	12.1
2007-03-31	10
2007-06-30	11.2
2007-09-30	9.5
2007-12-31	7
2008-03-31	2.6
2008-06-30	-2.5
2008-09-30	-5.1
2008-12-31	-6.8
2009-03-31	-3.9
2009-06-30	-2.2
2009-09-30	0.7
2009-12-31	6.6
2010-03-31	4.9
2010-06-30	4.1
2010-09-30	5.6
2010-12-31	2.8
2011-03-31	2.2
2011-06-30	3.2
2011-09-30	0.1
2011-12-31	0.4
2012-03-31	1.2
2012-06-30	0.7
2012-09-30	4
2012-12-31	4.8