Year Percent Change From Preceding Period 2004-01-01 3.38133472593947 2005-01-01 9.13561839205101 2006-01-01 35.30609985693730 2007-01-01 16.35033341847440 2008-01-01 19.65226642048010 2009-01-01 17.94086714458330 2010-01-01 14.47599617194390 2011-01-01 1.00340583462678 2012-01-01 7.34328076539692 2013-01-01 21.16379955947780 2014-01-01 3.95104601103941 2015-01-01 12.55824734794740 2016-01-01 5.50044152930751 2017-01-01 17.41201706851760 2018-01-01 5.90975321463108 2019-01-01 4.27559063014952