Month Percent 2010-06-30 -13.4 2010-07-31 -2.7 2010-08-31 0.1 2010-09-30 -3.2 2010-10-31 -0.7 2010-11-30 -3.2 2010-12-31 -4.1 2011-01-31 -3.1 2011-02-28 0.2 2011-03-31 -0.4 2011-04-30 -2.8 2011-05-31 -3.7 2011-06-30 -0.2 2011-07-31 -1.2 2011-08-31 -2.5 2011-09-30 -0.4 2011-10-31 0.5 2011-11-30 1.4 2011-12-31 2.2 2012-01-31 0.8 2012-02-29 -1.3 2012-03-31 -1 2012-04-30 3.4 2012-05-31 3.6 2012-06-30 0.4 2012-07-31 0.4 2012-08-31 -0.6 2012-09-30 0.9 2012-10-31 0.4 2012-11-30 -0.3 2012-12-31 0.1 2013-01-31 1.8 2013-02-28 2.8