Year Percent 1996-01-01 0.41138600000000000 1997-01-01 0.26637400000000000 1998-01-01 0.13916099999999998 1999-01-01 0.25464400000000000 2000-01-01 -0.16246200000000000 2001-01-01 0.33471700000000000 2002-01-01 0.47568999999999995 2003-01-01 0.75866700000000000 2004-01-01 0.86051399999999990 2005-01-01 0.65734900000000000 2006-01-01 0.77551700000000000 2007-01-01 0.66352000000000000 2008-01-01 0.43914700000000000 2009-01-01 0.56453300000000000 2010-01-01 1.32236000000000000 2011-01-01 1.42830000000000000 2012-01-01 0.87436299999999990 2013-01-01 0.83224900000000000 2014-01-01 0.82447000000000000 2015-01-01 0.77679300000000010 2016-01-01 0.79438100000000000