Year Percent Change From Preceding Period 2004-01-01 4.49625312239793 2005-01-01 3.00672915463907 2006-01-01 3.38942438448181 2007-01-01 4.48582839847175 2008-01-01 4.81623812071210 2009-01-01 4.78866430351472 2010-01-01 3.89881687384608 2011-01-01 2.23144970484268 2012-01-01 5.90955632681476 2013-01-01 1.57075969011698 2014-01-01 1.34759966835434 2015-01-01 1.99999999999993 2016-01-01 1.80000000000000 2017-01-01 1.00000000000005 2018-01-01 2.00000000000033 2019-01-01 1.99999999999963