Year Percent 2010-01-01 0.5489 2011-01-01 0.5620 2012-01-01 0.5669 2013-01-01 0.5751 2014-01-01 0.5802 2015-01-01 0.5786 2016-01-01 0.5726 2017-01-01 0.5620 2018-01-01 0.5558 2019-01-01 0.5524 2020-01-01 0.5521 2021-01-01 0.5518 2022-01-01 0.5513 2023-01-01 0.5507