Year Percent 1996-01-01 150.0000 1997-01-01 150.0000 1998-01-01 56.2500 1999-01-01 53.6145 2000-01-01 59.3333 2001-01-01 59.2593 2002-01-01 62.1768 2003-01-01 59.9469 2004-01-01 61.9591 2005-01-01 61.2189 2006-01-01 59.0628 2007-01-01 58.2039 2008-01-01 53.2829 2009-01-01 54.4052 2010-01-01 59.7852 2011-01-01 54.9989 2012-01-01 72.7761 2013-01-01 78.6244 2014-01-01 67.2968