Year Percent Change From Preceding Period 2004-01-01 6.59794485903752 2005-01-01 4.50509567240121 2006-01-01 4.22391427876417 2007-01-01 8.05832156450956 2008-01-01 5.39967779507200 2009-01-01 3.18680890692519 2010-01-01 5.34666469655053 2011-01-01 6.31200175008143 2012-01-01 15.17818970537580 2013-01-01 20.72004328480010 2014-01-01 4.55468775582905 2015-01-01 -20.48770451141160 2016-01-01 6.29711881952464 2017-01-01 3.67321524270729 2018-01-01 3.68846050813454 2019-01-01 5.54551845898991