Year Percent 2000-01-01 43.425 2001-01-01 43.550 2002-01-01 44.550 2003-01-01 45.275 2004-01-01 45.300 2005-01-01 45.075 2006-01-01 46.025 2007-01-01 46.275 2008-01-01 45.775 2009-01-01 45.075 2010-01-01 44.675 2011-01-01 44.475 2012-01-01 44.150 2013-01-01 44.075 2014-01-01 43.750 2015-01-01 43.825 2016-01-01 43.775 2017-01-01 43.550