Year Percent 1995-01-01 253.25599999999997 1996-01-01 238.59300000000000 1997-01-01 284.99900000000000 1998-01-01 295.05900000000000 1999-01-01 249.89300000000000 2000-01-01 271.99800000000000 2001-01-01 275.54700000000000 2002-01-01 281.36600000000000 2003-01-01 271.97300000000000 2004-01-01 266.15300000000000 2005-01-01 247.86000000000000 2006-01-01 241.98300000000000 2007-01-01 250.31700000000000 2008-01-01 196.09000000000000 2009-01-01 161.42700000000002 2010-01-01 137.81600000000000 2011-01-01 114.07100000000000 2012-01-01 110.10900000000000 2013-01-01 101.93799999999999 2014-01-01 94.36300000000000 2015-01-01 102.72200000000001 2016-01-01 104.76899999999999