Year Percent Change 2010-01-01 7.2238 2011-01-01 4.8877 2012-01-01 4.0302 2013-01-01 3.7530 2014-01-01 4.2007 2015-01-01 3.1355 2016-01-01 3.9088 2017-01-01 4.4932 2018-01-01 4.0000 2019-01-01 4.0000 2020-01-01 4.0000 2021-01-01 4.0000 2022-01-01 4.0000 2023-01-01 4.0000