Year Percent Change from Year Ago 1996-01-01 2.900139504933860 1997-01-01 3.260879793622350 1998-01-01 2.218161887999000 1999-01-01 2.948007099058860 2000-01-01 3.746962068929270 2001-01-01 0.823089186975078 2002-01-01 0.466344928484126 2003-01-01 0.390073865051048 2004-01-01 2.668193459416850 2005-01-01 2.336664490820610 2006-01-01 3.912924347041430 2007-01-01 0.909360891090979 2008-01-01 -0.512024949308415 2009-01-01 -4.906629920257370 2010-01-01 1.870993691162270 2011-01-01 1.336830625232960 2012-01-01 0.226522967805078 2013-01-01 0.933294405289868 2014-01-01 1.619428836757330 2015-01-01 1.606608142713490 2016-01-01 1.964023935351580 2017-01-01 2.276772763250760