Year Percent Change 2010-01-01 9.2304 2011-01-01 7.9504 2012-01-01 6.6186 2013-01-01 5.6748 2014-01-01 6.4797 2015-01-01 3.0522 2016-01-01 3.1297 2017-01-01 5.6785 2018-01-01 6.2974 2019-01-01 7.4252 2020-01-01 7.0889 2021-01-01 7.0556 2022-01-01 7.1799 2023-01-01 7.1799