Quarter	Percent
2008-12-31	-0.8
2009-03-31	-3.1
2009-06-30	-5.3
2009-09-30	-6
2009-12-31	-3.2
2010-03-31	-2.9
2010-06-30	-2.3
2010-09-30	-2.4
2010-12-31	-4.5
2011-03-31	-3.6
2011-06-30	-2.9
2011-09-30	-2
2011-12-31	-3
2012-03-31	-3.7
2012-06-30	-4.3
2012-09-30	-4.5
2012-12-31	-3.3
2013-03-31	-1.1
2013-06-30	1.5
2013-09-30	4.1
2013-12-31	4.7
2014-03-31	6.2
2014-06-30	7.3
2014-09-30	8.2
2014-12-31	9.1
2015-03-31	10