Year Percent Change 2015-01-01 9.0412 2016-01-01 11.0114 2017-01-01 6.7641 2018-01-01 8.0515 2019-01-01 7.7169 2020-01-01 7.1454 2021-01-01 6.9359 2022-01-01 6.9121 2023-01-01 6.9582