Year Percent Change 2015-01-01 1.9115 2016-01-01 2.2230 2017-01-01 2.2150 2018-01-01 2.5860 2019-01-01 2.4868 2020-01-01 2.4875 2021-01-01 2.4881 2022-01-01 2.4888 2023-01-01 2.4894