Year Percent 1993-01-01 85.6456 1994-01-01 154.1810 1995-01-01 370.3100 1996-01-01 312.9680 1997-01-01 311.7760 1998-01-01 219.3900 1999-01-01 158.8450 2000-01-01 135.5800 2001-01-01 87.6087 2002-01-01 73.4168 2003-01-01 75.2587 2004-01-01 73.2080 2005-01-01 75.4766 2006-01-01 77.6873 2007-01-01 80.9314 2008-01-01 90.9744 2009-01-01 96.8932 2010-01-01 92.5116 2011-01-01 89.6972 2012-01-01 89.5043 2013-01-01 89.7183 2014-01-01 89.5403 2015-01-01 90.6078 2016-01-01 89.7389