Year Percent 2010-01-01 0.8459 2011-01-01 0.8614 2012-01-01 0.8265 2013-01-01 0.8188 2014-01-01 0.7714 2015-01-01 0.7669 2016-01-01 0.7301 2017-01-01 0.7244 2018-01-01 0.7109 2019-01-01 0.7062 2020-01-01 0.7022 2021-01-01 0.6988 2022-01-01 0.6961 2023-01-01 0.6938