Year Percent Change 2010-01-01 9.1597 2011-01-01 14.7199 2012-01-01 11.0508 2013-01-01 10.1628 2014-01-01 10.3462 2015-01-01 6.4525 2016-01-01 6.2000 2017-01-01 6.4696 2018-01-01 6.1892 2019-01-01 5.6364