Year Percent 2000-01-01 26.250 2001-01-01 25.525 2002-01-01 25.525 2003-01-01 26.475 2004-01-01 28.000 2005-01-01 28.750 2006-01-01 28.475 2007-01-01 26.925 2008-01-01 26.275 2009-01-01 27.300 2010-01-01 31.375 2011-01-01 33.025 2012-01-01 32.275 2013-01-01 31.600 2014-01-01 33.000 2015-01-01 32.450 2016-01-01 32.775 2017-01-01 32.975