Year Percent Change 2005-01-01 30.8180 2006-01-01 31.7115 2007-01-01 19.2578 2008-01-01 13.0074 2009-01-01 5.1206 2010-01-01 2.8889 2011-01-01 6.4624 2012-01-01 5.5998 2013-01-01 2.3931 2014-01-01 1.6354 2015-01-01 1.6719 2016-01-01 -1.0000 2017-01-01 0.3681 2018-01-01 2.0000 2019-01-01 2.0000