Quarter Percent per Annum 2010-01-01 -10.72 2010-04-01 -7.92 2010-07-01 -13.61 2010-10-01 -18.72 2011-01-01 -17.37 2011-04-01 -18.15 2011-07-01 -16.40 2011-10-01 -16.78 2012-01-01 -9.96 2012-04-01 -8.15 2012-07-01 -8.49 2012-10-01 -5.59 2013-01-01 -6.00 2013-04-01 -5.73 2013-07-01 -2.63 2013-10-01 -1.83 2014-01-01 -3.62 2014-04-01 -4.42 2014-07-01 -3.12 2014-10-01 -1.14 2015-01-01 2.12 2015-04-01 2.87 2015-07-01 4.81 2015-10-01 4.07 2016-01-01 5.37 2016-04-01 9.58 2016-07-01 7.61 2016-10-01 7.92 2017-01-01 4.98 2017-04-01 6.45 2017-07-01 4.67 2017-10-01 2.46 2018-01-01 1.82 2018-04-01 -0.60