Quarter Percent 2011-06-30 15.9 2011-09-30 -0.1 2011-12-31 -37.4 2012-03-31 -6.1 2012-06-30 -11.9 2012-09-30 11.3 2012-12-31 -9.2 2013-03-31 -13.2 2013-06-30 -7.8 2013-09-30 11.4 2013-12-31 -20 2014-03-31 -30.7 2014-06-30 14.8 2014-09-30 6.9 2014-12-31 -47.6 2015-03-31 18.9 2015-06-30 -42.4 2015-09-30 -10.9 2015-12-31 -29.5 2016-03-31 -18.2 2016-06-30 93.8 2016-09-30 -17 2016-12-31 -7.1 2017-03-31 156.1 2017-06-30 11.3 2017-09-30 50.3 2017-12-31 -30.6 2018-03-31 -2.9 2018-06-30 11.9 2018-09-30 36.9 2018-12-31 -1.7 2019-03-31 -39.3 2019-06-30 -26.6 2019-09-30 64 2019-12-31 2.5 2020-03-31 69 2020-06-30 2.8 2020-09-30 4 2020-12-31 -23.4 2021-03-31 -10.1 2021-06-30 29.5 2021-09-30 5.2 2021-12-31 48.5 2022-03-31 -5.9 2022-06-30 23.9 2022-09-30 -2.3 2022-12-31 9.6 2023-03-31 -19.1 2023-06-30 -22.6 2023-09-30 -24.6 2023-12-31 -24.8