Year Percent Change 2010-01-01 7.1804 2011-01-01 6.9002 2012-01-01 4.5461 2013-01-01 6.4760 2014-01-01 5.1978 2015-01-01 2.9517 2016-01-01 4.0015 2017-01-01 2.7149 2018-01-01 4.5016 2019-01-01 4.5023 2020-01-01 4.5000 2021-01-01 4.4996 2022-01-01 4.5002 2023-01-01 4.4959