Quarter	Percent
1999-03-31	0.9
1999-06-30	3.1
1999-09-30	2.6
1999-12-31	2.5
2000-03-31	19.6
2000-06-30	23.1
2000-09-30	14.1
2000-12-31	44.2
2001-03-31	3.3
2001-06-30	-9.8
2001-09-30	-2.7
2001-12-31	-20.5
2002-03-31	-11.8
2002-06-30	2.3
2002-09-30	2
2002-12-31	7.2
2003-03-31	8.7
2003-06-30	5.1
2003-09-30	4.9
2003-12-31	1.1
2004-03-31	7.5
2004-06-30	3
2004-09-30	15.6
2004-12-31	21.3
2005-03-31	1.1
2005-06-30	27.6
2005-09-30	18.7
2005-12-31	14.7
2006-03-31	22.4
2006-06-30	4.6
2006-09-30	11.7
2006-12-31	15.1
2007-03-31	29.5
2007-06-30	14.4
2007-09-30	6.2
2007-12-31	19.2
2008-03-31	24.1
2008-06-30	27.2
2008-09-30	50.6
2008-12-31	26.4
2009-03-31	19.8
2009-06-30	26
2009-09-30	-5.4
2009-12-31	-8.7
2010-03-31	-10.9
2010-06-30	-13.4
2010-09-30	-3.2
2010-12-31	-4.1
2011-03-31	-0.4
2011-06-30	-0.2
2011-09-30	-0.4
2011-12-31	2.2
2012-03-31	-1
2012-06-30	0.4
2012-09-30	0.9
2012-12-31	0.1