Quarter Percent 2012-06-30 -15.2 2012-09-30 -12.9 2012-12-31 -4.4 2013-03-31 -6.2 2013-06-30 -5.2 2013-09-30 -5.1 2013-12-31 -8.1 2014-03-31 -13.1 2014-06-30 -8.2 2014-09-30 -9.2 2014-12-31 -18.3 2015-03-31 -6.5 2015-06-30 -21.3 2015-09-30 -24.8 2015-12-31 -19 2016-03-31 -26.2 2016-06-30 -0.1 2016-09-30 -1.9 2016-12-31 5.1 2017-03-31 39.9 2017-06-30 21.8 2017-09-30 41.3 2017-12-31 31.3 2018-03-31 3 2018-06-30 3.2 2018-09-30 0.8 2018-12-31 10 2019-03-31 -2.2 2019-06-30 -12 2019-09-30 -7.9 2019-12-31 -7 2020-03-31 20.2 2020-06-30 30.7 2020-09-30 16.7 2020-12-31 8.5 2021-03-31 -7.4 2021-06-30 -1.9 2021-09-30 -1.6 2021-12-31 16.1 2022-03-31 17.5 2022-06-30 16.2 2022-09-30 14.1 2022-12-31 5.7 2023-03-31 1.8 2023-06-30 -9.5 2023-09-30 -15.2 2023-12-31 -22.8