[["2013-03-31", 55.7], ["2013-06-30", 56.9], ["2013-09-30", 56.7], ["2013-12-31", 50.7], ["2014-03-31", 55.1], ["2014-06-30", 55.4], ["2014-09-30", 55.0], ["2014-12-31", 49.7], ["2015-03-31", 52.9], ["2015-06-30", 53.9], ["2015-09-30", 53.5], ["2015-12-31", 54.4], ["2016-03-31", 52.9], ["2016-06-30", 53.4], ["2016-09-30", 52.7], ["2016-12-31", 50.4], ["2017-03-31", 52.3], ["2017-06-30", 53.2], ["2017-09-30", 51.7], ["2017-12-31", 49.1], ["2018-03-31", 50.9], ["2018-06-30", 52.2], ["2018-09-30", 52.1], ["2018-12-31", 50.0], ["2019-03-31", 52.0], ["2019-06-30", 53.5], ["2019-09-30", 53.0], ["2019-12-31", 53.9], ["2020-03-31", 56.2], ["2020-06-30", 57.0], ["2020-09-30", 57.2], ["2020-12-31", 56.3], ["2021-03-31", 60.2], ["2021-06-30", 59.7], ["2021-09-30", 59.8], ["2021-12-31", 57.2], ["2022-03-31", 60.3], ["2022-06-30", 63.2], ["2022-09-30", 64.4], ["2022-12-31", 62.4], ["2023-03-31", 65.6], ["2023-06-30", 65.9], ["2023-09-30", 66.6], ["2023-12-31", 66.5], ["2024-03-31", 66.3], ["2024-06-30", 65.6], ["2024-09-30", 65.3], ["2024-12-31", 63.1], ["2025-03-31", 66.0], ["2025-06-30", 65.7], ["2025-09-30", 65.0], ["2025-12-31", 61.5], ["2026-03-31", 64.6], ["2026-06-30", 64.4]]