Year Percent Change from Year Ago 1996-01-01 3.496683643575800 1997-01-01 4.426210372541070 1998-01-01 4.791771444070740 1999-01-01 3.888212733368550 2000-01-01 3.787494640640870 2001-01-01 1.943304042981390 2002-01-01 0.768796877033960 2003-01-01 -0.934205177499424 2004-01-01 1.811583030528340 2005-01-01 0.766785031718357 2006-01-01 1.553053266449390 2007-01-01 2.492001866683740 2008-01-01 0.199272811624757 2009-01-01 -2.978104780746580 2010-01-01 1.898691724628810 2011-01-01 -1.826852908557880 2012-01-01 -4.028256710532240 2013-01-01 -1.130155239243430 2014-01-01 0.893187083529588 2015-01-01 1.822066278358400 2016-01-01 1.925736244960290 2017-01-01 2.795045949330840