Year Percent 1996-01-01 0.88825000000000000 1997-01-01 0.88413300000000000 1998-01-01 0.87236200000000010 1999-01-01 1.11701000000000000 2000-01-01 1.13032999999999980 2001-01-01 0.80723700000000000 2002-01-01 0.34225500000000003 2003-01-01 1.29357000000000000 2004-01-01 0.91385000000000000 2005-01-01 0.74870700000000000 2006-01-01 0.75926600000000000 2007-01-01 1.65869000000000020 2008-01-01 0.74129600000000000 2009-01-01 0.78276600000000000 2010-01-01 2.14635000000000000 2011-01-01 1.91155000000000000 2012-01-01 3.49079000000000000 2013-01-01 4.60470000000000000 2014-01-01 6.74135000000000000 2015-01-01 8.22258000000000000 2016-01-01 8.16981000000000000