Year Percent 1996-01-01 0.60975600000000010 1997-01-01 0.59523800000000000 1998-01-01 0.78740200000000000 1999-01-01 1.71858000000000000 2000-01-01 2.77162000000000000 2001-01-01 1.32325000000000000 2002-01-01 0.46865800000000000 2003-01-01 1.60514000000000000 2004-01-01 1.73577999999999990 2005-01-01 2.31309000000000030 2006-01-01 2.40798000000000000 2007-01-01 2.79259000000000000 2008-01-01 2.33674000000000030 2009-01-01 1.50022000000000000 2010-01-01 0.29719100000000000 2011-01-01 0.07084500000000000 2012-01-01 0.07084500000000000 2013-01-01 -0.10070499999999999 2014-01-01 0.23041500000000000 2015-01-01 -0.14194000000000000