Year Percent Change From Preceding Period 2004-01-01 2.34011731200689 2005-01-01 2.99727256174872 2006-01-01 2.49672856892513 2007-01-01 6.51158743510166 2008-01-01 4.14193126736017 2009-01-01 -1.53753628114949 2010-01-01 4.21856327180985 2011-01-01 5.61392332488183 2012-01-01 5.91532236661150 2013-01-01 3.93363752127076 2014-01-01 3.70826584489678 2015-01-01 3.81258321533487 2016-01-01 10.45784898515910 2017-01-01 8.24614443941834 2018-01-01 5.80683371734099 2019-01-01 5.93163234710937