Year Percent Change 2015-01-01 2.3878 2016-01-01 2.1373 2017-01-01 3.8232 2018-01-01 3.6223 2019-01-01 3.1699 2020-01-01 3.1041 2021-01-01 3.1114 2022-01-01 3.0392 2023-01-01 2.9660