Year Percent Change 2010-01-01 3.9718 2011-01-01 6.5895 2012-01-01 4.0439 2013-01-01 4.8741 2014-01-01 4.3936 2015-01-01 3.0520 2016-01-01 2.0431 2017-01-01 1.7681 2018-01-01 2.7457 2019-01-01 3.2522 2020-01-01 3.6490 2021-01-01 3.6499 2022-01-01 3.5500 2023-01-01 3.5500