Year Percent 1996-01-01 0.27133200000000000 1997-01-01 0.28270000000000000 1998-01-01 0.57721000000000000 1999-01-01 0.17641700000000002 2000-01-01 0.26393000000000000 2001-01-01 0.17791099999999999 2002-01-01 -0.08383400000000000 2003-01-01 -0.32594900000000000 2004-01-01 -0.04911000000000000 2005-01-01 0.29537100000000000 2006-01-01 0.27751900000000000 2007-01-01 0.45755600000000000 2008-01-01 -0.31428700000000000 2009-01-01 -0.12436700000000000 2010-01-01 0.06558100000000000 2011-01-01 0.01668900000000000 2012-01-01 0.12902900000000000 2013-01-01 0.12745499999999998 2014-01-01 0.12777700000000000 2015-01-01 0.10420900000000000 2016-01-01 0.14687999999999998