Year Percent Change From Preceding Period 2004-01-01 7.00971028184112 2005-01-01 9.71741517474791 2006-01-01 25.08379607912880 2007-01-01 21.46543144438340 2008-01-01 15.38326899510220 2009-01-01 26.80055276249970 2010-01-01 7.90204931705589 2011-01-01 5.47506789611267 2012-01-01 10.01810042226010 2013-01-01 15.93621964060470 2014-01-01 3.94497601036623 2015-01-01 13.57916467512240 2016-01-01 26.39366155698670 2017-01-01 3.80030978694787 2018-01-01 5.16855569853967 2019-01-01 6.09234118646316